I remember that reaching back to grammar school, I often stood up against my teachers. I had parents wise enough to teach me to stand for right things. I remember that one of my 6 grade teachers told my mother that she somehow admired my physical resistance in accepting a corporal punishment when I believed I did not deserve it. In seventh grade, one teacher threw me out of the class for disrupting her lecture, when I questioned the accuracy of it. She ended up apologizing, and later I was told that the principal advised her to come better prepared for lectures.
I understand your point, but the examples you bring up tell me that there is nothing wrong with telling young people to stand what they believe is right. The problem is with parents failing to tell their children what is right.