Another overreaction, what a surprise. Not the existence of the "trigger warnings", mind you, but the response to them. Isn't it intellectually dishonest to claim that warning people in advance of a discussion of a potentially-sensitive topic is equivalent to allowing them to avoid learning about them altogether? What's wrong with saying, "We're going to be talking about this, and it might be difficult or disturbing to you, so you need to be prepared for that"? I have no issue with professors voluntarily including "trigger warnings" on their lectures, as long as such are not mandated by the university.