No. I did go into a Chinese restaurant and order and pay for take out and walk out to my car to leave. When I turned around to go back in one of their employees was running toward me. Yeah, I don't go there now.
Nope. I always use a credit/debit card at the pump.
I see the stories of people paying for "to go" at a restaurant, then walking out without the food. I always wait until I receive and check the food before paying ... because they ALWAYS forget SOMETHING in the order. Even "fast food", I don't use the drive-through because I won't pay before making sure the entire order is correct.