It's rare when "cancel culture" actually means anything besides "arghhh, people are holding me accountable for what I said" or "I need a cheap shot here, to make someone with a conscience look like Stalin." Sometimes, a college will ban a controversial guest speaker with views deemed unsavory, and I would allow that this can be unfortunate, and a missed opportunity for students to use those critical thinking skills the college is supposed to be teaching them. Really, just let Milo Yoknapatawpha (or whatever his name is) have his moment on the soapbox, and face whatever jeers or cheers come his way. It's also good to have a Q&A session when such guest speakers show up, so that students can learn how to challenge the flaws they encounter in someone's ideas.