RE Point 1. All it takes is one of those other peers' parents to allow them to view pornography and then that kid just becomes the porn-distributor for the school, just like some kids in my day passed around porno mags. In essence, nothing changes for the kids, but every single adult is at best inconvenienced and at worst at risk of government invasion of their privacy. Not worth doing, imo.
RE Point 2. They could just use a whitelist instead of a blacklist/filter. They exist already, after all. Fill it up with sites showing the wholesome version of the world you want your child exposed to and they can only visit those places.
Yeah this is the thing everyone here seems to ignore. The moment someone does age verification and downloads a file the whole thing falls apart.
You would have to lock down any electronics device that can be used to bypass the restrictions. In reality the best way to do this is to build a screen based nudity filter into the device, which is not only more effective, it exposes this whole nonsense as an attempt to grow the police state.
RE Point 2. They could just use a whitelist instead of a blacklist/filter. They exist already, after all. Fill it up with sites showing the wholesome version of the world you want your child exposed to and they can only visit those places.