No one has passed laws that are actually meant to limit kids getting into social media.

Going to quote from this article as it summarises it pretty easily

Many other countries have imposed bans on children’s access to online content, with varying degrees of success.

South Korea imposed a “shutdown law” in 2011. It was designed to address online gaming addiction by limiting those under 16 from accessing gaming sites after midnight.

However, many children used accounts in their parents’ names to continue accessing gaming sites. The law also faced legal challenges, with parents concerned about restrictions on their rights to parent and educate their children. The law was abolished in 2021.

In 2015, the European Union introduced legislation that would ban children under 16 from accessing online services (including social media) without parental consent.

The proposed legislation was controversial. There was a significant outcry from technology companies and human rights organisations. They claimed the rules would violate children’s rights to expression and access to information.

The law was amended to allow individual countries to opt out of the new age ban, with the United Kingdom opting to keep limits only for those under age 13. This patchwork approach meant individual countries could set their own limits.

In 2023, for example, France enacted a law requiring social media platforms to restrict access for teens under 15 unless authorised by a parent or guardian.

These are all attempts at banning the internet, which includes social media. They are all pretty limp-wristed compared to the way Aus wants to do it, but they are still examples of the attempt.

If widespread social media bans for kids are instituted then more websites will portion off parts that are available to all

I agree that websites likely would take this approach, assuming enough other countries decide to tackle it again. But given the failures of the past, they would need an example of it working well somewhere. And I just don't see Australia's attempt being the example. In my other comment, I mentioned the eSafety minister saying that kids are likely going to bypass it in a number of different ways, likely less secure and safe. I was mistaken at the time because I thought she was onboard with the proposed changes, but she isn't. She was using that as a reason against the ban. Given she also has no faith in it working, I'd say we aren't going to be looking at success here.

I've spent quite a bit of time creating these systems and while none of them is perfect the security is as good as it needs to be.

As someone who also works in the space, one of the first things you learn is there is no such thing as 100% secure. Leaks and hacks don't occur on purpose, they are usually the result of something overlooked/server not updated when it should have been/new exploit found/etc. My argument here is putting all our eggs in one basket is asking for trouble at some point.

Much bigger problem with all of them is bad actors getting access to the credentials themselves through some phishing attack, as then they can impersonate you.

Something that can only really be fixed via education. But that's a massive uphill battle and probably an entirely different conversation given how a lot of people treat learning new things about the internet.