There should be a locked state where no more orders can be added to the current order, and the order can still be printed. This will avoid having genuine hungry users from being disappointed.
I'm not sure how this would be implemented without authenticating the user who's taking the order. As it is, anyone would be able to lock and unlock the order willy-nilly anyway.
There should be a locked state where no more orders can be added to the current order, and the order can still be printed. This will avoid having genuine hungry users from being disappointed.