Originally Posted by
Preypacer
Perhaps a system that allows you to "like" or "dislike" members in your group.
If you're in a group with people who are obnoxious and you don't ever want to group with again, you can "dislike" them, and it'll automatically skip over any future parties with that person in it.
Conversely, if you find certain people to be awesome, or much more enjoyable to play with, you can "like" them, and it'll try to group you with those people again in the future if all other conditions match, they're available, etc.
This way people can create their own filtering system and it affects no one but them.