I've worked in restaurants surrounded by professional bums and legit homeless.

It's easy to tell the difference. I use to carry my lunch to work. It was cold oatmeal and two cold boiled eggs. If someone asked me to give them lunch I'd tell them it's not my food to give away, which it wasn't(the restaurants food I'm speaking about), then I'd offer them my lunch. People who were actually hungry would take it. People who weren't would stick their nose up at it.

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I had woman come up to me and say "My husband left me with six kids last night... blah, blah, blah." It was my first week at that place and I just told her I couldn't help her. Six weeks later she walked into the restaurant and said the exact same story word for word. That's what I told her "You told me that exact same story word for word six weeks ago." She didn't say another word and just turned and left. I figure she probably floated around the different spots at a certain interval peddling that story.