Here is a brief video of the heckling that greeted Douglas Wilson at Indiana University. He was invited there to speak on Christian views of sexuality and then heckled by students who claim that they are defenders of free speech. One has to wonder what "free" means in the term "free speech":
Doug did send an email out to contextualize that a number of students and professors, even those who disagreed with him, came up to him after the speech and apologized for the behavior of the hecklers.
