To be frank, while it may have a level of technical beauty, this kind of "opt-in whitelist" approach is an authoritarian's dream.

Once the baseline is established, the playbook becomes simple: Shift that age bracket up to the very moment when someone can vote. Make sure that every new voter spends all their formative years unable to access even basic resources on the struggles that marginalized groups go through, and the history of their existence; set the bars for the "whitelist" so high that one must toe the party line in every bit of messaging, and thus is effectively a list of propagandists whose businesses can be fined astronomically if they deviate. Take away the parent's choice, and make it mandatory to use routers that block the non-whitelisted TLDs for any device that doesn't cryptographically authenticate as being operated by an adult. Find ways to impose this on groups other than children (for instance, by making it illegal for criminals to access the non-whitelisted web, then greatly expanding that definition). All in the name of peace and tranquility.

If you want V for Vendetta, this is how you get V for Vendetta.