5. Pepe
By all accounts, Pepe is actually a pretty nice guy off the pitch. In interviews he certainly comes across as personable and friendly, and few people have a bad word to say about him away from football. If this is true, he must have the world's worst case of white line fever, that near-mania that descends over athletes when they cross the markings onto the field of play. We probably don't need to run down Pepe's long list of misdemeanours here, so we'll just recap perhaps the most notorious: in April 2009 Real Madrid were playing Getafe, and Pepe got into what we'll call a "disagreement" with Javier Casquero. He not only chopped his opponent down, but kicked him twice, once in the back, pushed his head into the turf and stamped on him a couple of times. Then, just for good measure, after he was sent off -- because of course he was sent off -- he swung at another opponent, Juan Angel Albin. He was given a ten-game ban.