There are a lot of people who sign their PM's with "regards" and I would find it conceivable that people would sign messages in similar ways.
The tl;dr way to protect yourself from possible fake feedback is to only accept feedback from people you trust, and if your trading partner does not have enough of that then use escrow
Given all the previous evidence provided, all the users posts are in shdvb's thread (probably signed the messaged out of habit and didn't realize it possibly because he's been doing it so long), and the fact that this has been an ongoing thing for awhile, I'd lean more to the fact that shdvb is manipulating the trust and bump features to make his services look more popular than they actually are. This was a major problem from the previous sites he has been on.
