Ah, yes, children, the second rate people. What you wouldn't tolerate for a second they can always be forced to comply with. For Security, or just because some local school bureaucrats decided on something.

A giant security theater already exists in the form of rating systems, age verification prompts, legal agreements of popular services stating they prohibit underage users completely, etc. For decades every single kid has ignored it or learned to find another way if common one was blocked. It's the “responsible adults” who need such large scale stimulation to keep believing in some “naturally unspoiled children” who only need to be “protected”, and therefore can happily live without education and guidance (on topics that are not quite clear to most grown ups either, to be honest).