Call me crazy but I have reason to believe bungie are always listening in on your conversations in halo 3. Why I believe this is well because when I had a party of 8 and was playing for a long time, anyway then some guy joined the game his name was Flying 1337 then he told us he new everything we said from the last 30 minutes we all started talking about what a noob he was then he told us somethings we were saying before he entered the game I asked how he knew and he claimed he worked for bungie. Ever since then I never talk in game anymore I just send messages. PS: Bungie is listening!!!!! ALWAYS!!!!