The crane isn't the only 'glitch' on Highrise. There's a way to get on top of one of the buildings and be able to shoot without being seen. Not as bad as the one in WaW where people could go underground, of course. Not glitches, they're intentional, I'm almost sure that IW put them in there for them to be intentionally discovered and used (why else all the teddy bears?). Eitherway this is nothing new, people have always been doing similar jumps to access interesting areas (some I believe in MW were truly unintended) and the Highrise one just seemed like a really obviously inside joke for previous MW multiplayer gamer. And also, just not a big deal, people can still get shot, the non-crane glitch is fairly difficult to do and leaves you vulnerable for a *long* time while you set it up, and aircraft can still get you too. It's not a game breaking completely unfair advantage (like say all the moon jumps in Halo 2 that let you get way way way above the map). Also, regarding campers, kill cam people, use it. Someone kills you and they're camping, you can find out where they are and kill them because you have the advantage. Not difficult (if they're camping).