» Thu Dec 31, 2009 8:28 am
I too can vouch for this, I have a whole Squad of friends and myself who are now 50's from playing on what I can only assume to be a modded server. Modern Warfare 2 saw the same thing happen with modded/hacked lobbies, and I believe it's still completely possible.
XML editing is possible, so it wouldn't surprise me if server configs/files are too. If you're worried about your rank so much though, just do the "Nanosuit Reboot" in your "Operative Status" page. It will not reset your overall stats, but it will reset your rank, xp, perks and weapons. It's like prestiging in Call of Duty.
Hopefully Crytek could shed some insight on this, but seeming the current track record, I'm very doubtful.