A few years back we employed a down-on-his luck college student. This poor guy didn't have two pennies to rub together and was constantly hungry. I was out in the stacks one day and found a jar of nuts that a patron left behind. I stuck it behind the Ref Desk in case anyone asked for it and a few hours later I noticed it in the trash can. I asked what happened to it and the college student said "I ate it".
The same student returned from the employee lounge one day and said that he had just finished a really awesome chocolate-mint ice cream cake that someone had left in the freezer. I looked at him and immediately asked "Do you feel okay?" He said "Sure, why?" I then told him that the cake had been left over from a birthday party that another employee had several months earlier. Unphased by the discovery he replied "It was a little freezer-burned but tasted okay."
