I may have previously mentioned that in order to entice people to go to their football games, Columbia gives away free beer to spectators. Specifically, they have a fenced-in drinking area right outside the main gate into the stadium; you get IDed when you go into that area, you get a bracelet, and then you can go show your bracelet and they give you a cup of beer. There's a limit of four per person, and the way they enforce this is by making a mark on the bracelet with a felt-tip pen each time you get a beer.
I'm pretty sure all of you see the flaw in their security already, but I'll explain it for the less devious among you: once you've had your four beers, you can just rip your bracelet off and go get a new one. I think my buddy Rich and I each had seven (free beers, not bracelets) before they cut off serving 30 minutes after kickoff. (Then we started on the Captain Morgan, courtesy of my inside coat pocket.)