I think booing in general is really lame unless it's booing the following: - a bad call by an ump - the opposing team - a succession of missteps by your team The most recent phenomena I've seen that's really stupid is Brewer fans propensity to boo what might happen. In other words, Turnbow goes 2 - 0 on a guy and everyone boos him. Or he walks someone after two consecutive Ks and everyone boos. But then they'll cheer when he Ks the next guy to get the third out. Why not wait until he's actually hurt the team by giving up a run? To me, that is just idiotic. If you're going to boo stuff like that you do not have the mental capacity to enjoy watching competitive sports and you should find another hobby....like repeatedly slamming your forehead on a piece of cinderblock.