The vending machine at my college dorm malfunctioned so it would give your selection and give your change back. It went on for a couple days until, over the we

The vending machine at my college dorm malfunctioned so it would give your selection and give your change back. It went on for a couple days until, over the weekend, an acquaintance / former roommate used the trick to empty the machine. Most people were mad at him for "ruining it for everyone". I understood, though, why he did it: he had no money and no food.