easy, just unplug live until it hits the shelves. then they won't know you played until you log back in and surprisingly have finished the game in one day.
that's what i would do if there was any chance of getting banhammered just for getting a lucky street break.
maybe they can tell if he's playing a legit copy and leave him alone?
ha! we had the same thought almost simultaneously. could you be my english brother from another mother?
I actually taught that too. However, when he plugs his system back in, don't the achievements show up with the dates they were achieved? I don't know if MS have anything to notify them when an unreleased game is or has been used, but if they do, that will be a dead give away.