1) human resources
violation - breaking policies set in place by the Human Resources
Departmant of the company you work for. Often the policy in question has to do with improper language in the workplace, in which case this becomes a synonym for saying something rude, crude, or politically incorrect.
2) human rights
violation - taking away the rights people have as a result of being human. Torture, slave labor, and genocide are some examples of human rights violations.
1) "You have made countless dirty jokes, off-color remarks, and racist, sexist, and homophobic comments, and forced the rest of us to pretend to be amused. In short, you are, as another co-worker put it, 'a walking H.R. violation'"
-- from an anonymous letter on a website called Kiss My Freckled Ass Goodbye
2) "Helsinki Commission Speaks out on HR Violation in Russia"
-- a headline on Human Rights House Network's website