Here in Ottawa last week a student group erected what they called a free speech wall at Carleton University. Two days later it was torn down by another student, a gay rights activist who considered it to be a threat even though no hate speech had been written on it. You can read his rationale here. Quoting from it: I can't understand the kind of persecution he and others like him have suffered in our society (I saw some examples of it when I searched online, pretty despicable). But has it really reached the point where free speech itself is a threat? Again, nothing hateful was written on the wall. How is it a moral imperative not just to fight hate speech, but also any potential means by which it could be expressed? Edit to add - the details are here.