We used to have a really bad PO for our area. You would go in there and 30 people would be in line and the workers would be moving in slow motion and had an attitude.
A few weeks ago they had to call the cops because somebody in line got so frustrated they started yelling and berating the PO workers behind the desk. I was there to pick up a package at the quick service window (an oxymoron, by the way) and the manager came out brcause the stamp machine was down. I spoke to him about the state of affairs at his PO and said that he has to know thaings are bad because of the frustration level of everybody that comes in there and that I have never had to wait as long at other post offices as I did at this one.
We ended up having a gloves off loud heart to heart in the lobby, but at least they didn't call the cops.
About 3-4 weeks after that I noticed a definite improvement in the level of service there. People were actually moving faster and trying to br friendly, at least. There haven't been lines hanging out the doors. I'm not taking credit for the slight improvment, but something happened.