Personally, I've never had any problems with QS, and I appreciate his knowledge on technical topics. Most of the drama happened before I was an active member here anyway.
There aren't many users with this much negative feedback who stick around.
I am a very principled person
I believe this. I've also seen someone claim you don't lie, I like that, even though it means evading answering questions once in a while.
Prior to the escrow crap, he was actually a very good scam buster and good member of the forum. I still believe he can contribute to the community in a positive light, but If I was him I would steer clear of any escrow activity.
I would support changing tags to a neutral(or at least most of them), but 1 member needs to keep a neg there so that new users/old users are able to see his history. I only say this due to the fact that many users don't even look at feedback unless they see the red mark.