I haven't honestly seen a cheater... seen macro users, but outside of the hackusations I haven't seen any sign of cheating. And you will see it a lot when school gets out, I even had one newb go as far as calling me an awful aim botter when I pointed out I had 3 kills and 8 deaths one mission lol. Basically if your quick with a mouse and get lucky one kill some of these kills will cry for hours about hacks, even had one ballsy one tell me he was a GM and he would ban me if I didn't fight fair, I had a shotgun, not sure how you aimbot with that.. I called his bluff, and reported him, and quickly had him begging for me to let it slide, after I got stuck in 3 missions with the little turd constantly messaging me telling how my ban was coming any second.
"Keep a cool head and maintain a low profile. Never take the lead - but aim to do something big." Deng Xiaoping