"As the Americans learned so painfully in Earth's final century, free flow of information is the only safeguard against tyranny...Beware of he who would deny you access to information, for in his heart he dreams himself your master. Commissioner Pravin Lal, 'U.N. Declaration of Rights' "
It’s not like the internet was censored when I was coming up, and I don’t think less of kids today than I do of myself.
Kids stumbling across something when browsing innocently isn’t really a major issue, and if they seek it out: they will find it, you won’t stop them, kids are smarter than you think (just, immature and unwise).
The best method, honestly, is for parents to be forethcoming..
however you have now successfully reframed the discussion into “what about the kids”, when in reality it’s about getting everyone’s ID so that they can better enforce their draconian internet comment laws… the government even outright said this. https://archive.is/3pave
if the government really cared about protecting children, they would’ve made a freely available child protection software that anyone can install in their home network, or subsidised its deployment at ISPs as an advertised opt-in.
The thing is, the tech and infra for this is already out there. For example DNS services that offer adult-website filtering. The cost to implement this at the ISP level really wouldn't cost much (at at technological level).