We try to keep tabs on rude people, but it's really hard.
It's a sad side effect of the internet: The socially inept/ rude/ obnoxious people of the world can sit behind their computers and make everyone life miserable with their rotten/ rude/ derogatory comments. As much as most of us just want to have fun and play, there are allot of others are just looking to fill the void in their sad, sorry lives and what better to make yourself feel better then crapping on someone who can't do anything to you.
Those of us who want to enjoy ourselves have to eat it sometimes. But as Logress said, tell us. We'll take care of them as best we can.