I had a friend when I lived in Daytona who would call Domino's, and order two pizzas. After they arrived she would chatise the driver (some kid with no clue what the order was) about the order being wrong. She'd call Domino's and yell at the manager and he'd send out two more "correct" pizzas in 20 minutes.
Worked like a charm. We had pizza Friday at her place.