It doesn't really matter quite so much on here what the nutters want to do..
If they go on an auction wrecking spree, it costs the seller nothing to relist, the wrecker gets banned (and they don't get to come back under another ID, it aint that easy) and things carry on as normal.
This isn't evilBay, unwarranted negs get removed, sellers don't get suspended for nothing, and bans are exactly that.
You saw how quickly the trolled threads got removed? Well I'm sure they'll all get bored when they realise that they're not going to disrupt anything much here.