I'm sorry, but seriously? Those are your demos? The first is like a 15 second clip of him running up to a wall and looking around and then getting shot. No kills. The second is like a 30 second clip where he kills a couple people, one being me. Wireframes on and he obviously wasn't walling. Checked the bullet holes and he obviously wasn't no-recoil.

If you're going to ban someone for hacking, at least have decent demos backing up your accusations.