When the Pittsburgh Steelers won their fifth Super Bowl in ’06 against the Seattle Seahawks, fans took to the streets of the Steel City to celebrate. They smashed up overturned cars, climbed telephone poles, tore up street signs, flipped mailboxes and lit a dumpster on fire. But they broke sports riot rule number one: you can shake the car and even flip it over, but if you’re gonna total somebody’s whip, you really have to go ahead and light it on fire too. It’s just common courtesy.