One time when I was at the makolet, the guy in front of me was really nasty to the cashier and criticized him for moving too slowly. The cashier was clearly very hurt, but held himself back from responding. I asked him for a bracha since there is an inyan to ask someone for a bracha if they were insulted and held themselves back from responding.
My main intention was really to make him feel good because I felt really bad for him, and I was REALLY impressed. Anyhow, he gave me a very nice bracha. It was around Rosh Hashana time, so he gave me a bracha that the next year should be better than the previous one. And it was!
I felt so bad for him. People should make an effort to be nicer to cashiers and bus drivers. They work hard, spend a lot of time and energy helping Am Yisrael, and put up with a lot of criticism and insults.