Everybody with common sense KNOWS that they shouldn't play games pre-release.
Not even 1 day before release let alone 1 month ;'D
See now I don't play online, so this I don't get. Why not even a couple of days early? Plenty of people get legit copies a few days early, certain shops you are pretty much 100% going to get it Thursday, maybe even Wednesday (Friday is official release for most stuff here). Microsoft have stated before they won't punish for playing legit games early and if you have faith that your firmware is safe and Microsoft can't tell the difference (So many seem to have 100% faith in the firmware), then as far as they are concerned, your copy is legit, so should be fine.
Obviously this is a different case, as if you aint a reviewer, you're either playing a copy or your playing an original that was grabbed from where they're are made (or at least that's what I read somewhere). Either way, no good and no need to see if it's a copy or not.