I just want to inform you not to rely on the forum when it comes to tackling scam related activities. The forum doesn't moderate scam.
Safeguarding yourself from scam related activities should be your priority don't ever think it's that of the forum.
Shouldn't the forum be a part of a solution with an easy measure? Your words can be read as intending to see the trust system as irrelevant or unnecessary.
It already has a punishment which involves banning the culprits, leaving red trust isn't necessary. Just report with valid evidence to moderators. Trust system should be used for issue relating to trades especially when it has to do with the negative feedbacks
Trust ratings have been used also against plagiarists. On cases of partial plagiarism an automatic ban can be too harsh.
you need to differentiate plagiarism from scam, they have somewhat different intentions
scamming is a crime while committing plagiarism is an ethical offense
https://www.checkforplagiarism.net/plagiarism-law"university rules for student conduct sometimes say that plagiarism is an academic offense, not a legal offense. That statement is not correct."
"Plagiarism is fraud."
There are several countries where plagiarism is a crime.
OP doesn't add any new point.
I searched but didn't find that thread. But it has about 8 months and I raised different points.
Then check their feedback before you do business with anyone. We can't be responsible for babysitting everyone.
The goal of the trust system is to be a part of the solution. It isn't perfect but it's what we have. Why not use it to the full extent?