Using the Duty finder for high level content is becoming a growing problem as well.

I hate to sound like a broken record here but until there is a real socialy negative aspect to being a complete douche, people will continue to be. No ammount of "thumbs up points" will stop leechers from leeching, and morons from being morons, and outright rude people from being just that.

Give players a chance no matter how small it is for their rediculous actions to come back to bite them someday (Being blacklisted by people on your server to find they are very important social figures in the community). Just look at how well behaved most people are in the real world in social situations, the "Jerk" in real life in a minority instead of a swelling growth on the community due to the social implications of randomly lashing out at those around you.