The way to combat that is to very vocally accuse anybody trying to institute those sort of policies of being an evil classist who is keen on neglecting the education of families who cannot afford reliable internet access, or computers for each school-aged child. The more vitriolic the better; the idea is to catch them off guard such that the fastest way for them to combat the accusations is to backtrack completely.

Some schools may get around these accusations by doing shit like providing each student with computers/tablets with cell cards. That's when you start beating on the privacy drums. Most public schools do not have anywhere near the necessary resources to do that though.