Remember playing Goldeneye/Call of Duty/whatever in split-screen mode, trailing behind your friends a little on the scoreboard, when you get a sudden, overwhelming, urge to peek at their section of the screen? Come on, you’re the only person reading this - no need to pretend you've not done it. We’ve all done it. Screen watching is a universally recognised, and highly effective, method of cheating. It’s not fair when your friend is stomping you by a single point and all he/she’s doing is trying to avoid you. The only logical decision in that situation is to screen watch. Of course, once you get a taste for it, it’s difficult to stop. Soon you’ll be accusing friends of screen watching despite the fact you’ve been doing it for the past two hours. A vicious downward spiral.