Hi, I've taught college-level classes at a university. I've also recently worked as an official for a state department of education, which regulates all the public schools in the state, and in one of the more controlling states (but I no longer work there).

This is not even close to what's actually happening. Nobody looks up a person's online activity unless there is (based on casual judgment) a reason for suspicion. If someone does get looked up, though, and they have aggressive statements, it raises a lot of red flags, which may get the student on a 'watch list'. Teachers have the duty of caring about not only their own, but all their students' safety.

That said, this is a conservative person advocating for less privacy on the internet because of their own fear. We would better ensure student health by encouraging schools to teach students about emotions, emotional expression, conflict mediation, and giving students freely available access to mental health counselors (not just academic guidance counselors). A band-aid approach does nothing but cause an infection to fester.