If a school or library receives e-rate funding then they are required by law to monitor students online activity and protect their privacy from 3rd parties. They also typically have security practices that must be in place for their insurance company. The school board and parents could whine and complain about student privacy all they want but the law and their pocketbooks will make these decisions for them
I recently went in because I had a thunderclap headache, thought it was about to die from a brain aneurysm. No insurance. They did 1 CT scan and billed me for a Head CT, Neck CT and a Cervical Spine CT, each costing over $3K. After months of calling their billing department I ended up having to setup a payment plan before they sent it to collections. Not a single person in the billing department, up to and including the head of billing, could tell me the difference between a neck CT and a cervical spine CT. Still on the hook for over $11K. Probably going to have to file for bankruptcy soon. My life is effectively over.