I taught in urban high schools for decades. And I was always strongly in favor of cameras in the classrooms and in the hallways.
We never did get cameras in the classrooms. But we did get them in the hallways. Now here’s the funny thing. Whenever there was a hallway fight, the camera that covered that area was usually “broken”.
The administration obviously didn’t want any fight video getting out. Can’t have the school look bad. It’s all about the PR.
Nowdays those school fights are all over youtube and world star