I used to have anxiety about it, but I think it was because I felt forced to be nice to people that were generally fake and didn't show me the same courtesy. I worked at a charity hospital and had a man and woman screaming at me and calling me "the white devil" because I wouldn't "force the doctor" to write five times the antibiotics they needed because there were too lazy to bring their other kids to the doctor. I think that was the day I gave up on working a "job" to help people.