It's all accounts on the Xbox it was bought on, and the buyer's account on any other Xbox. So no, they can't use their tag to play your game on any Xbox other that yours.|
As for the logout thing, no idea but I'd imagine so. I know I can be logged into 360 and Xbox One at the same time, but never tried two of the same.
Zomoniac 8,806 posts
Seen 59 minutes ago
Registered 12 years ago