People want safety. There are multiple ways to achieve that, electronic surveillance is just a lazy/economical way of doing it with a not insignificant civil liberty cost. If you aren’t being hurt, you might think that cost is too great, if you are being hurt, you won’t.

So I guess as a society, we should try to provide safety, and if surveillance isn’t desirable, we have to be willing to pay higher costs for another solution (eg fewer students per class so teachers can pay attention to bullying).