Steven Irwin Fans - Teeth?

Watching the news this afternoon I was struck by something: Steve Irwin fans (at least the ones who'll spend the night in the rain for tickets to some hokey memorial service) lack teeth. They've not lost all their teeth, but your average Irwin fan is missing 2-4 visible teeth. How did they lose these teeth? Bar fights, punchups from the missus' new man, opening beer bottles in their mouth, runins with the law?