I kick people who are annoying and won't shut up, rude, can't follow directions, or are cocky but suck. Just happens to be squeakers who fit that bill many times - but if it's an adult doing one of the things above, I'll kick them too. Kids don't automatically get the boot from me, in fact, many are quite good at the game. If they can follow the team strategy and are quiet when instructions are given, they're okay in my book.