Also you have way to pistive on the outlook of MMO players. Most non-trolls will still rage and yell obsenities if someone messes up.
There is no excuse for such behavior. If they have to be punished be removal of in game rewards (fines and compensation), then good. That kind of player needs to show up less - they chase away new people. Look at the fighting game genre. It's rife with horribly behaved players, and it is one of the key factors keeping people from joining in. An infamous incident at one of the Capcom X Tekken webisode things put off quite a lot of people, myself included.
Look, I'm not saying you can't get upset, but is it so wrong to ask people to at least try and behave? Is it wrong to think that games may need to implement the perverbial swear jar?
As for the actual trolls, a quick look at the logs and a few questions to those involved are probably all it takes.