This idea is about having profile rating on trade, you can have it named something like quality/rating/score/etc and displays such as 10/10 or 100/100 depending how you were rated on a trade.
such as if you scam someone you may get 9/10 or 99/100 for one scam or a sort of rating just so people know and if you have traded fine without problems you get a score 10/10 or 100/100.
You could also show this maybe as "100% trust worthy" being displayed and as you go down percentage It says stuff like "99% Near trust worthy" "85% Neutral"

It works by having a comment section on your profile and has a rating + and -
This idea has some bad and good as for the good: You can go around and find people the most trust worthy or to be carefull with.
But the bad: People could rate you down for no reason.

Another Idea is that you could get commented about trading and the person who gets rated and commented HAS to approve to have it displayed and if they don't they can be infracted, I don't know if this will work but here is a little ruff image from paint >.<


Post your thoughts on this and post why and why not.
If you can't add this idea, something close to It would be great.