Network level content blockers are really easy to setup and they’d be even easier if bills targeted ISPs instead (requiring gateways have the tech built-in). It takes a pretty smart and determined kid to get around network controls and it can target specific devices so adults still have an unrestricted experience.

It takes a pretty smart and determined kid to get around network controls

Proxies and VPNs exist for a reason. If the entire country of China can’t keep up with the number of VPNs and proxies poking holes in their Great Firewall, what makes you think individual parents have the time to do so? You never used a proxy site to access blocked content on a school computer?

Right, so use them to your advantage? Don’t allow unfettered internet access on the device you give your child. Use MDM/Parental controls to lock its internet access to a proxy or VPN that blocks adult websites, as well as other anonymizers. Business have been doing this since forever.