I would be more careful with reviews, especially when it comes to newbies. I think, if your pens are itching to leave a review for a newbie, then it is enough to leave a neutral review. Not all newbies have pure motives from the early days of trading. Some start small to get more positive reviews and eventually disappear without a trace.
Exactly, this actually happened here. Someone gaining trust from the start and then has been left the forum having a defaulted loan. There are too many of them in general.
I had admitted that I also gave positive trust with someone else who helping or in any had transactions trade on me before but that was all about personal opinion. Regarding leaving negative trust on newbie members, don't hesitate to leave feedback if you have captured evidence or archive that you feel that the user is very risky to deal with. Selling, scam attempt, or any fraudulent activities should have negative feedback to give awareness to other users. You might also open a scam accusation thread so that DT members will help you.
But if that is all about spamming the forum, posting a malicious link, and copy-pasting from the article. That's the work of the MODs, you can simply report them to the MODs by hitting the button "Report to moderator".
This, this is really helpful stuff.