UPDATE 7 Sept. 2015:
QS has joined Tradefortress in the realm of the completely discredited thanks to an escrow scam he was pulling off. Surprisingly, a fellow who goes by the handle of "Wardrick" has appeared to inherit the Tradefortress lineage of lies. Why? Who knows, maybe he'll speak for himself in this thread.
I honestly have no idea why both QS and Wardrick seem to be giving up all of their hard work on their current accounts just to try and tag you with a negative feedback and keep it there.
I cannot speak for Wardrick, although it appears that he has moved onto other interests and his built up reputation here is really not being used very much.
If someone has stolen money from someone then it is only appropriate to leave a negative rating to warn others about their behavior. I do not think it is a good idea to remove a negative trust rating just because someone complains loudly enough or because they complain long enough or because they troll you hard enough. If you do this then scammers will easily be able to get a free pass to avoid the consequences that result from stealing.
I have spoken to numerous people on DT, most of which agree that tspacepilot's negative rating from me was appropriate, however they declined to leave one themselves.....despite them often leaving negative ratings to other scammers. I get the feeling that they were intimidated from just how well tspacepilot is able to troll those who speak out against him.