Check out this footage from the Red Sox and Angels game. You'll see a poor bastard getting hit by a slice of pizza thrown at him by an angry fan. It's graphic, so consider yourself warned.
I could write a killer entry about the time I had a slice of pizza thrown at me, but it didn't penetrate my "fit for public consumption" filter. My brothers know the story and are probably enjoying a good chuckle right now.
I don't mind having objects thrown at me, but wasting a good slice of pizza is so wrong on so many levels.