Guides for using Bisq

[n0nce]

What about....

Fuck it. Let's just pull a request, and setup an entire decentralized marketplace right now. 

Not a bad idea; people could even buy a very specific product that the Bitcoin seller wants, for fiat money and exchange that for Bitcoin.
I just chose cigarette packs a bit as a joke, due to being used as currency in prisons.. ^^

Historically, societies have been very creative in finding ways to transfer value, physically.
What about 'grams of gold' <> BTC as a trade pair for Bisq?

So you actually sent a merge request for this (CIG) List Cigarettes? 
Instead of Gold I would rather think about grams of Silver, it is cheaper, easier to find/divide and it has longer history as being used for payments.

I've got to disappoint; neither do I own the GitHub 'n0nce' username, nor could I open a GitHub issue with a custom number of #21000.. Just a bit of HTML trickery.

Silver sounds like a pretty good idea; it can even be bought (for cash or with card) and sold, in virtually any city easily. Need a way of shipping it though (more personal data?). Or face-to-face, of course.

[o_e_l_e_o]

What about....

You almost fooled me if not for the #21,000.

Sure, but I'd rather go with trusted buyers only, and that worsens the occasion.

Given that Bisq doesn't use a full reputation system, then that would be difficult. Although nothing stopping you from only accepting cash trades from users you have already done non-cash trades with and have a good local reputation score.

I am doing that all the time, but in best cases I am getting answers they lost all money in crypto investing in some shitcoins crap.
In worst cases they think it's all a scam or they never heard anything about Bitcoin.

In those cases, I just politely inform the merchant I'll take my bitcoin business elsewhere, and if they would like to secure my business in the future then to consider accepting bitcoin. Don't need to be pushy about it - just let them know a demand exists and move on.

Or face-to-face, of course.

Bad idea. Easy to fake and difficult to verify for the average person.