I played a cheaters all the time on xbox live. I was playing halo3, I still got the video. The guy had connection host and he was pretty much standbying on me. Me and my friend were playing double team, and this guy would hit standby everytime we got near him, go to black screen and we got assasinated. Was crazy, a game to 25 and one guy had like 19 assasinations. I left feedback and hit avoid player. I did it a few times, cause I called microsoft and they told me the best thing to do would be to leave feedback and his account would eventually be banned. The guy actually told me what he was doing after the game when I asked him how he was doing it.