At 15, working concessions at a movie theater, I ran around fulfilling an order, then asked the customer for payment. They insisted they already paid. I called my manager and my manager sided with them. The customers walked away smiling and laughing. The manager counted my register, it was short on that amount, and it was taken out of my paycheck. I was treated like I stole it.1
Many years later, I was a grocery clerk and the same couple came through my line at the grocery store (it was a small town), and they used food stamps. I was upset at them originally, but they were only sharing their suffering with me.

Footnotes

  1. This manager was later fired for stealing.