Ahh, the Wrigley bleachers. Home to the shiftless, the drunk, and the "I'm gonna ruin somebody's game before the second inning even starts."
Look, I get that throwing home run balls back is a tradition, albeit a really stupid one. Here's a Cubs fan, flanked by Reds fans, catching a ball tossed to him by Cincinnati's Billy Hamilton—and then throwing it back, despite the best efforts of the people around him. (He earns several "fuck you"s and a middle finger for the stunt.) Hey, if you didn't want that baseball, I bet there's somebody else who does! The people you came to the game with, for example.