they may be cheating but more than likely you are playing
"paintball" so one shot kill. gamerboy is my user name i have pro too 
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Yes some people cheat on XBC, it's much easier to do than on XBL since there is no ban for modchips , so people leave them on
um .. having a modded xbox has nothing to do with cheating .. you can cheat with an unmodded xbox .. i have 4 modded xbox's and would never cheat, and that goes for alot of people i know .. don't get hardware modding confused with game modding .. oh and for that matter not all game modding is cheating either ..
haha trust me I know how it works, it's easier to do however with a chip, you can use AR and whatnot, I've been around the scene, hardware hacks are different yes, I never said everyone cheats with modded xboxs, just that people leave them on.
I hate cheaters as much (probably more) as your average gamer.
But unless its obvious....watch playing the blame game, cause it might just be you suck (no offense....
if the guys has the same gun as you, and you shoot him in the chest, and he shoots you in the head.... well...
think about it. shot in the head = one hit kill / in ANY good shooter.
but then again there are ALOT of cheaters and people that ruin games out there!
if you know someone is cheating...without a doubt... report them, whether playing on XBC,KAI, or LIVE... cause enough complaints bout the same person will certainly raise eyebrows... cause everyone hates a fucking cheater!
Some times on halo2 all of a sudden it will switch weapons to the secondary, and I know i didnt bump the y button. Right at a key moment too.
This happens usually playing people i think are cheating.
Anyone else had this happen.