Yes, and it's an idea that has no basis on the actual, not theoretical, experience of most of us here.
However out of all the institutions I have personally and anecdotally interacted with, universities have by the far the most openness to dissenting ideas, by a very substantial margin.
A lot of people revel at the amount of internal gossip and conflict within universities, but the fact that it exists, rather than there being people kicked out without question, is a testament to its flexibility.