Is there anyone who can't do this today? Adult websites self label, and both your router and ISP offer removing adult websites as an option.
If your kid is going to get around that by clever vpn use, age gates don't help.
> Adult websites self label
Not social media sites. Sites like Reddit are everything. Some also go out of their way to hide certain information from parents.
Reddit (not to be too picky) does some weird things when a logger is in place, essentially making it impossible to know which subreddit is being accessed.
And that's really where the bad stuff lurks - it's peer to peer interactions.
> If your kid is going to get around that by clever vpn use, age gates don't help.
I think politicians and their supporters believe they do help. Of course from their perspective the only way to know for sure is to implement the restrictions (regardless of whether they succeed, at least they fulfill their campaign promises to their electors of "doing something").
I don't have any children myself, but as I understand it in the modern age:
Your kid's smartphone can connect to home wifi, mobile data, public wifi, and friends' home wifi - so network filtering alone won't cut it. And 'Encrypted SNI', 'DNS over HTTPS' and Cloudflare makes network filtering much harder than it was 15 years ago.
On top of that, there's loads of porn posted on Reddit, Twitter, Twitch and suchlike. So any effective block is going to have a lot of collateral damage.