that's why there should be a set of rules at least to be applied for DT members " as it would be hard to monitor everybody else". those rules need to specific and straight forward. for example
1-DT members have to reference every feedback.
2-you CAN NOT red tag someone for being a troll.
3-all negative feedback has to refer to scam activities or account sales.
You make some good points, but it's all up to Theymos. I wouldn't mind seeing some changes in the trust system here, and I've always said it was broken. Any trust system that allows anyone to leave feedback for anybody for any reason is broken from the start, especially when some feedbacks are weighted more heavily than others. Ebay's feedback system used to be essentially the same as bitcointalk's is now, but they quickly figured out how prone it is to abuse (they eventually made it worse, where sellers can no longer leave buyers a negative, but that's another story).
That's not to say the trust system here is useless, though. DT members negging scammers is a good thing, for example, even if the DT member wasn't the one who got scammed. I think Theymos is indeed considering some changes, and I'm hoping he doesn't make it even more complicated and fucked up than it already is.