Homesports comedyLetterman’s Signs You’re A Bad Referee [Video] Letterman’s Signs You’re A Bad Referee [Video] sports comedy 09/26/2012 Monty McMahon 252 4 Share it ! Is it time to laugh at the Green Bay Packers misfortune? No. Not yet. It is time to laugh at the NFL and the referees, though. With that, David Letterman brings us the top 10 list — signs you’re a bad referee. Share it !