1) I had a gentleman constantly shipping things from another country. He refused to wrap the packages well & they kept coming slowly. I had to gently tell him to rewrap them.
2) The whole receiving terminal shut down twice this season because of ice and snow, in this area. Consequently, many packages were late (although I was blessed that this didn't happen much in the delivery area I was in). One man was angry and wanted me to take the package back. I kindly explained why it was late and told him how sorry I was and took it back. UPS is good about those things.
3) HEAVY LIFTING! It was apparently appropriate to ask the receiver of the package to help you. I hated doing this, but I am a woman and had a man receiving a STOVE up 3 flights of stairs. I wish they would invent or maybe I could invent something that would help get stuff like this upstairs.
4) Security. I cannot tell you how many times idiots wondered what I was doing when I had a dolly, a UPS uniform and a truck a few yards away from me with UPS emblazoned on it! People need to check their paranoia.