Originally Posted by keep it simple
Perhaps we're missing a trick here. Instead of banning them, how about opening up a trolls only section. They're banned from the main site, & we can't interact with them, but they can throw insults between themselves as much as they like. Kinda like a Drummerworld padded cell therapy room. Once they've shown they can have a calming influence over the other trolls, they can enter the main site again.
This would provide great entertainment for the rest of us, and show our compassionate side by offering rehabilitation. We could call it the Drumgeon.
The bodybuilding.com forum has a de facto version of that, the misc section. In there nobody lifts weights, visits to other sections of the forum are rare, and it's probably the funniest/stupidest forum on the entire internet.
This could work.