Just as blacks don't have to watch minstrel shows? This is slander of a sort that is not tolerated when its objects are blacks, Jews or homosexuals or other privileged " minorties."
Well, technically, it's not slander. No reputational harm to any individual that can be measured or remedied.
But I'm curious. What is your proposed solution? Countering Leary's routine with other speech, or something else?
Just like I don't have to watch old Westerns that portray all American Indians as one-dimensional bloodthirsty maniacs.