Exchange negative trust feedback is unnecessary in most cases. I rarely put anyone into my distrust list but if I do, I will not likely to remove it. It stay forever but I don't see reasons why I have to leave any negative trust feedback on the user I distrust. Take it simple and reduce non sense drama.
It's still not reduce the drama
AFAICS JollyGood will distrust an user when that's user distrust him, same like this one where an user gave him a negative tag, then he will gave negative tag too or it can be said as revenge minded. The same happen when someone merited your post, you will merited his post too since you think he's a good and kind person. It's a human psychology, but in this forum such behavior isn't appropriate and it would make an abuse.
What I'm thinking is how possible if theymos implemented a new system where we can't see the user who trust, distrust, give positive/neutral/negative feedback and merited us except both administrator and moderators.