And if it's a legitimate disc, so what? Expecting every single customer to know you're "not allowed" to play legitimate copies of the game early or you get banned is ridiculous. I don't know what happened in the OP's case, but this seems like a reasonable scenario to me: OP goes into shop, friend lets it slip that they just got Halo 4 copies delivered, OP asks if friend can sell him one, friend agrees. The store shouldn't do it, but they did. The OP should not be banned for playing a legitimate disc, end of.