I was at Michigan State in the early 70s; it was simply more fun to demonstrate that to go to class. Believe me, I remember it well.
There are 'Union workers' involved too. And I would guess a lot of communists......
My husband attended a 'free speech rally' at UC in the early '70's, and got up there in support of our troops in Viet Nam, and got booed off the stage.
Yep. The left really believes in free speech....