What’s your definition of cheating?
I play on a big HDTV, I can see tiny people far away because the screen is so large. I also have Turtle Beaches, because I kept breaking the cheaper wired headsets and these looked sturdier than any microsoft ones, which means I can soundwhore (listen very closely for footsteps/bullets/etc) without waking the neighborhood. I also play with a group of friends who are at least as good as I am, and it’s not uncommon for one of us to go 100+ on rust, if the others help to spawn camp while one of us has a chopper gunner/AC130 (Tip: To camp a spawn on rust, Hardcore HQ, 1 person on top of the rig, one person on the level below, on person on the pipe, one person at the base of the pipe and one person by the truck – they’ll all spawn by those tall silo thingies).
It’s a matter of tactics, and group teamwork. On Highrise, I’ll get up top on the white building, camp with one man army, danger close and ninja (tac insertion) as well as a cold blooded/sniper/1man army and if I can’t kill someone or get a shot at them with an explosive, I’ll warn my teammates they’re coming around the corner, and if all you saw was the killcam, you’d think he was wallhacking.
Now, that being said, JTag’d xboxes do not mean people are cheating. Most people who have jtags do not have aimbots/autoaims/wallhacks/etc. There are some who do. What you’ll find more often are modded controllers, or Modified turbo boost controllers. These allow people to fire semiauto firearms faster than should be possible.
I actually have one, although I don’t use it, it was a home-made (no chip, just solder) mod and I shoot the FAL faster than it does.
Of all of that, the only “cheating” is the modded controller, and I never use it because it’s unreliable, unsportsmanlike and makes the game no fun.
Now, there’s also stat padding, where a group will get into a lobby to get titles/emblems. That’s a specific type of cheating, stat padding.
It’s possible to get the spinning skull emblem, you just have to be 10th prestige, and complete all the prestige challenges, almost everyone with it has boosted (stat-padded) for it, or has gotten into a challenge lobby. A challenge lobby gives you every title/emblem, usually with some strings attached (you can’t turn off your xbox, I think).