Like using a vending machine? Having worked at McDonald’s for 4 years before I started my long tech career, why do you think you’d known anyways after the food goes from grill to front counter via a bin? Double that via drive thru, there is always a division of labor anyways…it’s fast food after all.
Having had unhoused neighbors steal my order at Starbucks, I find the system they use in China reassuring.