Not really. Almost always, harassment is included if the segment who needs to "cancel" for everyone is involved.
At several universities, I remember that conservative speakers were hindered from entering the grounds. The intolerant ones could not simply decline to go hear him, or complain about it online. That's what normal people do when they think something is bad policy.
The distinct difference is that the intolerant ones make threats and block entrances and damage buildings and cause problems preventing everyone from hearing a speaker. THIS is the policy that should never be tolerated; and any such divisive people should be ousted from campus. Don't like a speaker (and we all have some we don't want to hear)? Stay home. You don't have the right to demand no one else listen to him.
There have been several recent incidents. Milo was blocked from giving a full speech at UC Berkley. The intolerant ones shouted him down so no one could hear him. He was warned not to appear at all, but he did, and got a few words out before they silenced him.
The College Republicans invited a journalist to speak at the University of Connecticut. Something about "It's Ok to be White" or something. They shouted him down the entire time. Then a woman came up on stage and stole his script or notes, and he grabbed back, and a fight ensued and HE was arrested. They got what they wanted. They silenced him. But they also damaged the building and broke windows outside, merely because they were unable tolerate someone with whom they disagreed being able to speak. On a freaking COLLEGE CAMPUS, you know, the place where the open exchange of ideas is to be welcomed? You cannot make this stuff up.
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At Columbia, they silenced some speaker who was talking about Muslim migration across Europe and some of its outcomes, because he was invited by the College Republicans.
University of Oregon's president was attacked on stage by those who could not tolerate even hearing him speak a word against Fascism. In Oregon, for goodness sakes.
Duke University President was making some banal speech against "change in labor practices and student support" when the intolerant ones screamed at him to get off the stage. Eventually they left, so they only interrupted that speech.
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