I agree that the media is overinflating things, and I also agree with a lot of the comments above - there’s nothing wrong with letting students know what they are about to get into, which is what a trigger warning is. “Trigger warnings” were originally supposed to be for students who might be suffering from PTSD or other mental illnesses that are triggered by memories of what caused the illness in the first place. You don’t want a combat veteran or a sexual assault survivor flipping out in your class - that’s not good for anyone.
“Trigger warnings” were not designed for students who simply feel uncomfortable discussing a viewpoint that they don’t agree with. That’s a misuse by the media.