Does anyone else have really strange FedEx driver stories?

A couple of years ago I heard a knock, went to the door, saw the FedEx guy walking away, called out to him, then again and again, louder and louder. He just walked into his truck and drove off. And my front door was right on the street, so there's no way he didn't hear me.

Today my mother opens the door after a knock, and the driver's driving off. And he waves at her as he goes.

I have lots of other complaints about FedEx, and I wonder if these stories are symptoms of a dysfunctional company, mistreating workers, etc. Or maybe we're just on the beat of a dude with a 'tude.