How you'll get busted: A 2x4 across the back of your head while walking through the Dodger Stadium parking lot in a Tim Lincecum jersey
Penalty: A brain hemorrhage

Tailgating is billed as a jovial tradition amongst sports fans, but you're still in a parking lot (read: fistfight capital of the world) and surrounded by people who react to false start penalties by drop kicking their coffee tables in half. In sum, tread lightly if you're wearing Redskins gear to Cowboys Stadium because a surly die-hard might rip off your driver's side mirror and scream, "That one's for Troy Aikman!" Consider wearing camouflage when you're mixing it up in a rival's kitchen, especially if you want to stay.