I just don't see how booing helps the team in any way. What are the goals for the people booing? To show THEIR frustration with the player. The player is doing his best and now he has to deal with the boos too. Baseball is such a mentally demanding game and booing just adds to the failure and IMO never helps make the situation better. If you really want to show you're upset with how the team is doing, don't go. That will effect the teams money situation and that's when it really hurts management/owners.