If i had my way..

Id let the community have a bit of fun. Ban the buggers from using chat and in game PM system ...

then as they are found flag the toon for in game pvp and force the highest level of agro on that account so every monster/ bug/plant squirrel etc etc...wants a piece of them. they can't hide in cities because they have some " gold seller pvp shame flag over their head and the community will kill them on site and they can hide outside the cities because they get swarmed by creatures AND community.

Ya im evil but its actually a doable idea and not far fetched..and imagine the press SE would get doing this. People would buy the game just to have a chance to grief the griefers..