grew up with a neighborhood rascal that pulled the same scam on a local pizza parlor...order a pizza using a fake name wait 30 minutes then go in and ask about any pizzas that didn’t get picked up. cheap or free every time! he only did it once or twice a month and they apparently never caught on as this went on for years.
Idiot owner then. I caught on to this scam in the late 70s working at a college campus Pizza Hut delivery store.