Some of the funny ones are the ones you can look up, like the "you know you're addicted to Call of Duty when..." jokes. This is one example: you know you're addicted to Call of Duty when you go into your boss' office, pick up his suitcase, make some beeping noises, say "bomb disarmed", and throw it out the window.
Hitler had 7 million kills and just 1 death. Guess what? he was a freaking CAMPER.
Forum with Jokes on: http://www.callofduty.com/message/105819212