I once saw someone at the SEA UC fill their backpack with chips and cookies. When he grabbed the last ones, he left the area, got a drink at the bar (I bet he didn't tip), then when the attendant came and refilled the chips, he came back and took them all again.

On one hand, it was sad behavior, and I wanted to report him. But on the other hand, he's getting what he deserves by consuming so much fat and sugars. I wonder if it was the same guy?