Luckily we live in a day an age where there's such an amazing function as an ignore command. Whereby we are not ever grouped again with that player. It's really a fantastic thing, you should try out every other MMO that isn't about 5 years behind.
You don't get it. Part of building a community (you know, the whole idea of keeping the LFG system bound to single server) is to make sure our fellow players are aware of a bad apple. Putting someone on your ignore list helps you, but it doesn't help the next person who gets stuck with them. By making others aware of a dirtbag, you're doing your part to make sure the community is just a tiny bit better. (Of course, I do realize I'm most likely talking to a brick wall in the only person that matters is me generation)