They don't understand. The guy was snarling and spitting and talking to himself out there on the mound in the first inning. Shame on Clemens for not exhibiting more control over those white-hot emotions. Piazza or anybody else could have been hurt by his actions. He has to have a mute button at that moment.
Guys snap often on the baseball field.
Paul O'Neill's vicious helmet-throwing fits are accidents waiting to happen. Jay Payton charged the mound in Game 5 of the NLCS, a lopsided game, even though Dave Veres wasn't throwing at him. Neither player was ejected. We want our athletes to play with intensity, especially in the most important games. If the player then makes a choice to inflame the situation, the umpire can run the player.