Due to my own mistake by apply to join DuckDice.io campaign, I made the topic:
Guide on avoid red tags by supporting already known scam projects. (The topic's tittle might be changed later).
If you think that this one is relevant for your topic, please add it into your list.  

Edited: I edit it with more relevant title.

The topic has been under construction.
Anyway, thanks for your contribution.

- Russian version: Пoкpacкa зa пиap мoшeнничecкиx пpoeктoв (by madnessteat)
- Filipino version: GABAY UPANG MAIWASAN ANG RED TAG MULA SA PAG-PROMOTE NG KILALANG SCAM(FILIPINO) (by sheenshane)

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Objectives

• To help newbies avoid jumping immediately into scam projects’ promotions;
• To guide newbies fundamental steps to check scam projects;
• To help newbies avoid getting red tags (of course).

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Table of contents

• Reasons of red tags
• Signals of scam project’s campaigns
• To-Do Steps to avoid red tags
• How to use forum search funtion?
• How to use key words for your search?
• Remove signature and avatar several hours after DT members warned that projects/ bounties are scam
• Where to find scam projects?

Reasons of red tags
1) Join and support already known scam projects;
2) Posts with ref links outside the place for signature or phishing links (violates the #4 and #6 rules there: Unofficial list of (official) Bitcointalk.org rules, guidelines, FAQ); ^[1]
3) Joining pumping services and get rewards from scam teams;
4) Abusements on forum rules (such as merit sellings, account sellings, trust sellings, and so on);
5) Scamming others to steal their money via loans, etc.
However, in the topic, I only mention about red tags due to supporting already known scam projects.

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Signals of scam project’s campaigns
(1)   Extremely high payment rates;
(2)   Easy requirements to get paid;
(3)   Bounty managers with red tags;
(4)   Unstransparent payments after payday, and lack of promise-kept on their payment rates.

To-Do Steps to avoid red tags
(1)   Checking the Trust & Flag history of bounty managers or creators of bounty topics;
(2)   Checking the Trust history of project’s main account in the forum;
(3)   Searching feedbacks/ warnings of community about their project’s trusworthy;
(4)   Investigating feedbacks/ warnings of bounty hunters about their payment history for participants;
(5)   Checking spreadsheets for past weeks;
That's all for bounty hunters.
If you are investors and want to dig deeper in order to make sure that you will invest your money into a good, unscammed one, the following topic will be helpful for you:
Guidelines, how to spot a scam ICO & report effectively. ✔ (by Coolcryptovator)

For my topic, I only guide you those five steps above. Now, let's get started.
(1) Step #1: Checking the Trust history of bounty managers or creators of bounty topics
Let's take the case of recently hot scam bounty, DuckDice.io as a case study.
This one, DuckDice PR is an alt of Duck Dice project, got red trust after opening scam signature campaign.
With - 32 red trust, in total.
Check trust of Duck Dice PR there: https://bitcointalk.org/index.php?action=profile;u=2536146

I added the additional guide for Flag:

Quote from: tranthidung on January 05, 2020, 01:41:16 PM

LoyceV developed his Trust Flag Viewer page, on http://loyce.club/trust/flags/?MD
Steps to check Flags and Flag status of the user you want to investigate Flag history before making deals/ trades.

• Visiting the page: http://loyce.club/trust/flags/?MD
• Choosing the newest version: by looking at the date of creation. ^[a]
• Using search with keywords: Ctrl F > Entering these keyword combination: flagged + "username of the user you want to investigate"
• Paying attention on total number of flags, type of flag, and status of flag (Active or not). ^[c]

^[a]: As of writing, the current version is this one: http://loyce.club/trust/flags/225.html
For example:
theymos flagged newsilike as the first user was flagged in the forum (?), here.

So if you use the Trust Flag Viewer page (of LoyceV), and keyword combination: "flagged newsilike", you will see the flag created by theymos highlighted (in Green).

^[c]: Total number of flags; type, and status of flags:
Next to the keyword combination is the type of flag (type one for this case).

How many flags newsilike has gotten so far: 1 (see the image)

You can recheck the result by visiting the Trust page of newsilike: https://bitcointalk.org/index.php?action=trust;u=157669

Advantages of the Trust Flag Viewer page (compare to the personal trust page for each user on the forum):

• You don't have to log-in your account to see it.

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LoyceV's (Personal) Trust Flag viewer [daily updates]
Trust flags

(2) Step #2: Checking the Trust history of project’s main account in the forum
DuckDice.io (main account)
The trust history shown red, with -256 red trust.
Check trust of DuckDice.io there: https://bitcointalk.org/index.php?action=profile;u=917361
If you don't known how to find main account of projects, please clicking on links to ANN topics. Then, you will easily know which ones are main accounts by looking at the OP's author of ANN topics.
Most of bounty topics give link to ANN topic in the OP.

(3) Step #3: Searching feedbacks/ warnings of community about their project’s trusworthy
Both, got red trusts. It's so bad, generally.
Then, let's dig deeper by looking at their trust history. Clicking on the Trust link at profile page of each account, it will lead you to trust history of eaech one.
- DuckDice.io's trust history: https://bitcointalk.org/index.php?action=trust;u=917361
- Duck Dice PR's trust history: https://bitcointalk.org/index.php?action=trust;u=2536146
Histories are both badly, too.

(4) Step #4: Investigating feedbacks/ warnings of bounty hunters about their payment history for participants
4.1. Looking at past bounties topics and comments of participants
- For example: [CLOSED] DuckDice.io Signature and Avatar campaign! (opened on February 01, 2017, 04:12:55 PM, closed and locked on February 28, 2017, 06:36:35 PM). Please remember that the old bounty topic locked for no reason. No one knows because the bounty manager did not disclose reasons.
- The newest one that opened days ago, has been locked too.

4.2. Using search with key words (if you don't find anything negative in their past bounty topics)
Details mentioned below.

(5) Step #5: Checking spreadsheets for past weeks
- If campaigns have publicly spreadsheets, at first it is transparent and good.
- Next, check the spreadsheet and see whether they pay for their participants in the past or not.
How to do this? Copying address of one arbitrarily chosen participant, and pasting it into the explorer to see past transactions.
If they really paid for their supporters, they are good.
If they did not pay, one more bad thing found.

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How to use forum search funtion?
There you go: [Tips] Guide for forum search (by coly20032003)

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How to use key words for your search?
For scam investigation, I highly recommend to use these key words:
- scam
- scam accusation
- exit scam
- scam bounty
- Two essential words:
     +The name of your interest project
     + bitcointalk.
Let's see results with some combination of keywords:

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Remove signature and avatar several hours after DT members warned that projects/ bounties are scam

It is a very important step.
If the campaign you joined has not warned as scam at the start, but days or weeks later, DT members tag it as a scam one, and warned that participants should stop supporting it. You should remove all your signature and avatar hours later.
It is un-official rule, but I think DT members will allow you around 72 hours to remove signature and avatar, before tagging you with red trust.
I will add a image of red-tagged case due to keep supporting scam project after received warning from DT members. When I saw a case, I will add it here

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Where to find scam projects?

• Scam burster club (since September 2019) (The list is on my to-do list, and will be updated next weeks).

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Reference:
1)    Be careful of not getting red-tags by advertising a known scam in your signature (by Cashi)
2)   [Tips] Guide for forum search (by coly20032003)
3)   Alt of DuckDice.io which was tagged for scam (by Coolcryptovator)

^[1]

Quote from: achow101 on October 11, 2016, 12:32:42 PM

Nowhere. Affiliate links (also known as referral links) are not allowed to be in a post anywhere on this forum. You can however have them in your signature.

Honestly, I made my mistake by applying to join DuckDice campaign. I am human, so I made mistakes, it's normal and likely acceptable if I don't repeatedly make it.
Therefore, I think that others can make same mistake and the topic will be helpful for so many forum users.

More than that, supporting shitty projects, that asked for pumping their ANN topics are one of riskiest way to put accounts under red tags.
In a nutshell, I think there are several reasons that might lead to red tags, besides account/ merit/ trust sellings:
1) Join and support scam projects.
2) Posts with ref links or phishing link in signature (violates the #4 and #6 rules there: Unofficial list of (official) Bitcointalk.org rules, guidelines, FAQ)
3) Joining pumping services and get rewards from scam teams.

Agree!
In short, buying bitcoin and / or grin coin is a best option at the moment.  

I support to add Coolcryptovator as a new merit source for the forum.
That guy is a self-made Senior member, and also added into list of DT1 members.
Additionally, days ago, that guy published the topic:
Alt of DuckDice.io which was tagged for scam
Fastly warned that DuckDice.io is a scam one for community.

I don't believe small exchanges will have significant contributions in long term, but for now people tend to hurry up with those news.
How do you think about it?
Comparision between Grin coin and Mimblewimble
Which one do you think is better?

It should be better to ignore all time high, intra-year highs.
It should be better to look at the historic price chart and see intra-year lows.
Let's see intra-year lows increased over years or not.
If yes, it is a good growth of Ethereum, definitely. 

Not totally exact!
Account selling is allowed, but only discouraged.


At least, theymos has not officially stated that selling merits is one of forum rules' violations.
Check it please:
Maybe, theymos mentioned about the violation of merit selling somewhere else. I will check it more.

Despite of the drops of Grin coin, theymos has not manually changed the rate for Grincoin to buy forum's Copper Membership.
 DO NOT POST SESC LINKS
2.252 Grin coin for one Copper Membership, for now.

Thanks for sharing.
The post of mjglqw is an inspirational one, but it is only a post, not a real story.
So, I reject to add this one into the OP's list of inspirational stories.

Thanks, but I rejected that one because the topic created on 21 Jan. 2018, days before the beginning of merit system.

It is what I expected, very close to my estimation based on the difference of medians of intra-days merits between periods before and after.
nearly 30% increases of both sMerits generated for merit sources, and of  median of total intraweek sMerits sent in the last two weeks.
So, you maybe right that the rises of merit circulations last two weeks come from the re-allocation sMerits to merit sources and their sMerits-give-away activities.
Anyway, let's see the merit circulation next few weeks to confirm the assumption.

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What I really wanted is to track the merit circulation over time (before and after periods) to see how long the level of interesting the Default Trust Changes last.
As we known that sMerits are not scarce, quality posts are.
Consequently, I have a feeling that when a new serious changes (or ask for opinion raised by theymos). Forum users, especially 'Etlite' class tend to become more active, discuss more. They, obviously, have enough skills, knowledge, experiences, and ideas to make highly quality posts. As side effects, their posts often got massive Merits in short period after changes implemented.

You even did not read what is merit and how it functions.
Merits are un-decayable (by now, theymos has not had plans to decay merits), so you raised a wrong point!

Furthermore, it simply support the suggestion of CryptopreneurBrainboss. I did not make any proposal, so you were wrong again.
The discussion should be stopped here.

In a nutshell, [after read all above posts] I would say some steps are neccessary to secure accounts:
- Strong password: should be as strong as possible, lower & upper case, letter, etc. And, the account's password should be totally different than any other accounts on other platforms (in the case using the same email for different platform).
- 2FA for email that used to register forum account;
- Strong antivirus software, and keep it always updated.
- Staking bitcoin signed address in the forum;
- Keeping the wallet (on computers) as safely as possible.

All those four steps are essential and enough to secure accounts, in my opinion.

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I remembered that I read a topic from a Hero/ Ledgendary who get their account back almost immediately after get the email notification.
When I saw the topic again, I will leave the link here.

It looks similar to the chart of bitcoin before it suddenly dropped hard from $62xx to $41xx
Sometimes (it rarely happens), consolidations and triangle patterns lead to further drops.
I wish that it is not the case of Grincoin.

I got your points!

However, it is just a theory.
If those merit sources gave away their sMerits with higher rate than usual as well as at faster speed, they probably dried up their allocated sMerits.
Of course, those sMerits sent would be circulated around the forum and contributed to the rise of total Merit circulation.

As you can see in the quote below, the difference between medians of before and after period (the cut-off day is 09/01/2019) is nearly 32 percent.
Therefore, I think that it will become clearer if we know the percentage of increased sMerits for all merit sources after the adjustment from theymos.
If the figure is somewhere around 30%, it explain almost all what we want to see.

Edited:
I checked the merit sources stats:
If the reason is from the reallocation of total sMerits allocated to merit sources, the figure before the adjustment should be:
20735/ 1.3 = 15950.
15950 should be the total sMerits per 30 days before the change.
Any ideas or real statistics with the figure 15950?

If your suggestion become real, we might see a new massive spamming in Meta like we saw in January and February of 2018, but I support your proposal.
Let's see the next adjustment of forum's ranking system.

Nice point!
If whales actually moved/ cashed out with such very high volume, DASH should be dumped, instead of fell only 8 percent like we all observed.
Therefore, I agreed with you that this is likely a statistical fault on coinmarketcap.com.

This is one of the best solutions, I think.

Wrong!
For someone who still thought that 2FA is the best solution, let's spend a minute to think of what will happen if account owners lost their 2FA backup?
Then, they will open a topic in Meta, complaining and asking for help.
2FA backups can be lost, but the quoted of your bitcoin signed address in the forum will not be lost at any odds.
The probability that both your original bitcoin signed address post and quoted-post from your original post deleted together are scarce, almost impossible.

It is the same pattern of Dogecoin. Let's note it into the notebook for later investments when market got bloody.
However, this time, Dogecoin has not risen, it has been dumped as others.

Waves, has still been one of exception, rising considerably during those hard days.