Oh, I totally agree. I've had my fair share of "run-ins" with professors that sucked because they were extensively biased. But the majority of professors I had were generally very open to debate and based their stances on research and not agendas.
I had ultra conservative Texas born and raised professors, I've had ultra hippie annoying professors.
The best were those who allowed you to think but showed you the evidence when you were wrong and why. Not just shutting you down.
The students who were ultra PC were in the minority when I was in school. The vast majority of students really only debated their studies and anything outside that realm was kinda under the mindset of "Live and let live, do whatever the fuck you want but don't impose it on me."
Yeah, I think times have changed though. I went to undergrad in the late 90s -early 2000s, and although I didn't participate in protests, discussion fora, etc., I never felt any sort of restrictions on thought/speech.
BUT, these days, there seems to be a trend, whether it's campus speakers, certain campus groups and their thoughts, Halloween costumes, etc. I think the Mizzou example is a good and easy one to use. The way they treated that journalist is unbelievable to me, and incredibly ironic. Also, I dislike that the president stepped down, over what seems like very minor incidents (I know the "outrage" is over how the incidents were treated, but jeez; unless I'm wrong, the two incidents were a student government person being yelled at with a racist remark, and a theater group receiving the same treatment).
case in point, your posts about the author and his views on higher education.