BF3 Cheats

I was playing BF last night and was killed by a level 100 in a tank
The thing that caught my eye was that although he was level 100 he had no stars for his tank.
I sent him a message saying just that and he left.

I'm guessing there is a cheat out now that lets you chose to be rank 100
Really can't see the point in that but I guess kids like to think they are somehow better because their rank is higher :/