I've got two points of comparison for mail workers:
My brother spent a summer as a part-time postal worker. He had many excellent stories to tell of those days. Unfortunately, at one point (years later) his car was burgled, and the postal uniform was taken. It was the main souvenir he had.

About a year or so ago, a lot of mail in my town was not being delivered. After a little investigation, it was discovered that one disgruntled employee was *dumping mail in the lake*. Very high class, that.