Long, detail-laden article by Michael Bérubé from The Chronicle of Higher Education about dealing with students with different standards of what is reasonable discourse.
But the dynamic of the class had been changed. From that day forward, John spoke up often, sometimes loudly, sometimes out of turn. He had begun to conceive of himself as the only countervailing conservative voice in a classroom full of liberal-left think-alikes, and he occasionally spoke as if he were entitled to reply to every other student's comment -- in a class of 17. He was forceful, intelligent, and articulate. Sometimes he was witty, and he was always knowledgeable about cyberpunk and postmodern science fiction. Often, however, he was obstreperous and out of bounds.