I'm not sure I'm totally on board with the "booing is only detrimental" stuff. I think booing can absolutely be a motivational tool. On one hand, it may provide a shot of adrenaline. "Oh, these people think I suck, well watch this..." There are lots of players who channel anger into production. Gary Sheffield was one such player and said he loved going into a stadium and getting booed. Obviously he was booed for different reasons in Milwaukee, but I'm talking about later in his career. Also, booing may be effective in the same way that scolding your kid is effective. No one likes to be booed. I'm pretty sure all the players are trying most of the time, but they are human beings. I think there are definitely some guys who are embarrassed to be booed. If a guy is caught spacing out during a routine play or not hustling on the bases, he might get embarrassed when he's called out for it. For some people, they won't care. But for some people, that's an incentive to not let it happen again. Some guys really seem to let the booing get to them (Turnbow, Parra) but I think there are definitely some players who feed off of it. Nothing wrong with letting a player have it when he's not doing his job. They make lots of money. They should be able to handle most of the stuff fans throw at them. Personally, I don't boo Suppan when he tanks - I don't think he's trying to tank and I don't think booing him helps him out. But I'm not going to say that no one should boo a struggling player. It's really your call, and it doesn't bother me if you want to boo the guy. I'm just not going to. But I won't sit on some St. Louis Cardinals-esque pedestal and tell you what the proper etiquette is.