When I was 18 (about 9 years ago) I worked the midnight shift at a 7/11. For those who aren't familiar, this is a kind of all night party store. I worked at one that sold liquor but the majority do not.

There was this bum who would come in a few times a week and hang out for about a half an hour at a time. It was the middle of an extremely cold winter so I didn't try to get rid of him or anything. He seemed fairly harmless. But one night he comes in and purchases a fifth of vodka...