Respect the rules! This is what the kids should be learning. If you don't agree with an umpires call, keep it to yourself. If there is a team rule that bothers you, well, its their team...not yours. If you think there is a serious problem, take it up with the coach or a League official on your own time, not your child's'. Rule of thumb: during practice or games, don't speak unless spoken to (except, of course, to cheer on ALL the kids).