An example of what people in positions of authority think is perfectly acceptable:
https://en.wikipedia.org/wiki/Robbins_v._Lower_Merion_School_District
School authorities surreptitiously and remotely activated webcams embedded in school-issued laptops the students were using at home. After the suit was brought, the school district, of which the two high schools are part, revealed that it had secretly taken more than 66,000 images.
A lawsuit wasn't enough, the administrators should be branded as sex offenders and the parents should have taken them out behind the school and beat the crap out of them.