> If there are people killing other people, I wouldn't say that a communication method was to blame. In Scream, Sidney didn't sue the phone company who let the killer call her from inside the house. The idea that some news feed posts whipped people up into a killing frenzy just sounds absurd.

This is the core of your point and a comment on the idea itself, not the way the article portrayed it. I think it's fare to characterize your dismissal as glib.