Australia

@Gorgritch_umie_killa @Lodespawn Doesn't sound too big a technological challenge (think along the lines of when you sign into a website using Google or Facebook as your ID provider). But puts more hassle on site admins. And, more importantly, how are users going to know if a site is actually doing authentication or just gathering their ID data? Then there's the question of what sites they will try and include in the ban. Meta etc is a given, but Lucy's Australian Knitting forum? iMessage? Signal? Mastodon instances?
Then there's the concern that all of a sudden Govt have a link between all of our online nicknames etc and our actual names. That's a massive issue in my eyes and they'll need to clarify if that's going to happen.
In the end my son could, and probably will, just rent a private server in Singapore for a couple of dollars a month and VPN through that. I expect he'll set his mates up on it too. So instead of some kind of visibility of what he's doing on the home network, I'll have none.
And we'll be paying handsomely for this whole exercise.
I, like a lot of parents I'm sure, am actually in favour of not letting kids into those places. But I can't, yet, see how it can be done.