really, I don't see how joining a guild helps, I've tried several, there is no organization and no cooperation within them, it's just a tag for your character to wear under their name, doesn't change the game at all.
I got kicked from a group today after the end boss was down and the epic chest was lit up... they kicked two of us... that's how we know we got kicked, because we saw each other's kick vote... the kick thing needs to be nerfed, hard.