Personally I'd rather my kid discover porn sites with cleartext(S) browsing, so I can be aware of the development and have a talk. Then later I can teach them how to use VPNs, TOR, and other secure protocols to eek out some freedom from this digital prison that Surveillance Valley has built for us.
In the old days the put the porno mags on the top shelf so kids couldn't read them. That was hackable too but it didn't matter much.