What really discourages me about all of this, is teaching the students to expect and accept this kind of treatment. I realize they are minors and often (necessarily) children's rights are limited or curbed to facilitate time to learn and understand consequences for exercising those rights.
As I watched my younger brother go through high school I was shocked to hear how the students were given no right to privacy in their lockers or personal vehicles, were under constant surveillance and could be patted down or searched at any time the school felt it wanted to (without parental consent or notification, and without any sort of probable cause requirements). The kids just accepted this and thought it was the way things worked... everywhere. No one told them that this was only possible because of the school setting; no one told them that when they became adults in the real world this sort of treatment from authorities was illegal and a violation of their rights. I don't like what we are teaching our kids, in the name of 'protecting' the kids. I'm afraid the level of scrutiny and personal rights violations that we are subjecting them to is desensitizing them to how wrong it is.
We wonder why citizens seem to just accept the erosion of their personal liberties, but what should we expect when we've been teaching them to just accept it since they were kids.