It is very interesting reading a thread like this because as usual each posting just reflects the people who post and really says nothing about the trolls, scapegoats, unpleasant persons, etc. Perhaps a thread where everyone tries to be the most awful troll possible might have some affect.
Then again how about a humanitarian approach where just the good bits of annoying persons are responded to and if they don't have any good bits misinterpret something they say as being good.
Karl Rogers reflecting back technique might be a good one:
Troll: You are all just a shit-load of hot air and flabby flesh.
Response: Troll, you feel like a shit-load of hot air and flabby flesh. I'm sorry to hear this.
Or, if it gets too much I guess ignoring them is the only possible alternative.

matai