Nothing. If the next person comes in to vote after you (which is easy enough to avoid if you use active voter lists), they might issue a provisional ballot. How

Nothing. If the next person comes in to vote after you (which is easy enough to avoid if you use active voter lists), they might issue a provisional ballot. How do they know which voter is lying? They don’t check ID, and the other ballot isn’t associated with a name. You have to be completely ideologically blinkered not to see a problem here.