Crazy dogs need to be put down.
Sadly, many of our public schools have numerous feral children running them. Their parents were either feral or are afraid to punish them. Teachers are either in agreement with their behavior or are too afraid to discipline them. The administration of most public schools is focused on keeping their jobs and federal funding and not the safety of the teachers, and students.
It all comes down to money- If schools report the violence, they will lose fund. If the Administration try to solve the violence issue, they risk losing their jobs.
Public schools are violent places where violent people prey on the weak.