It’s simple, really. Caught twice shouting down a campus speaker and a crybully gets suspended for a semester. Do it a third time and the violator is expelled. Of course, the left is losing its ever-loving mind defending its favorite fascist tactics for shutting out those they disagree with.
The UW system is owned and operated by the State of Wisconsin, so if the majority of elected officials believe that disrupting and interfering with invited guest to the campus reflects poorly on the state, they are well within their rights to set standards for how members of the campus community are to behave if they wish to remain enrolled.