If the kid knows how to buy a certificate from a shady website, then probably he his old enough to watch porn and other disturbing content. That does not mesn the system should be thrown away as a whole.
I did not say it should be thrown away. I said that it can’t be done while preserving privacy the way advocates claim. It’s totally plausible that the trade-off is reasonable, but I also don’t think we should pretend that the trade-off isn’t there.