[quote name='Scrubking']From what I have seen this is a difficult situation because you either have so many rules in place that you have to roleplay a half-assed evil character who really can't do anything evil or you remove the rules and get abused by asshole bullies.
I guess it boils down to what you prefer - not so evil, evil characters or assholes waiting around to ruin your day.[/quote]
This is what PK is for in some MMORPGs. I know in Asheron's Call, you have to make a conscious decision to go PK, and then the gloves come off. You'll see guys that kill anything that moves, and then factions rise up to combat those 'evil' characters. The problem is by the time someone decides to go the PK route, they've already played the good guy long enough, so you end up with a bunch of bad guys running around and very few good guys (Non PK characters can't attack PKs and vice versa).
It's one of the great problems of MMORPGs right now.