I've seen alot of people using Aimbot and wallhack, and I wouldn't be surprised if there are other varieties of hacks that I didn't notice yet.
The only thing I can think about this all is that Crytek is not putting an sufficient effort on the pc community support. It's sad that such a great game is being ruined by cheaters. I know that this thread isn't bringing any new stuff but I just would like to share my disappointment with what's happening with this game.