At least, that's how I learned it. Everyone seems to disagree and write em dashes with spaces nowadays.

You can't possibly convince me that Google couldn't develop something like that if they wanted to.

Whether its a fallacy or not depends a lot on how warranted the slippery slope premise is (notwithstanding other, possible logical errors that might me made in setting up the argument, of course).

At the very least, you will need to make sure that no child can install Linux. Otherwise, why wouldn't they? Most kids aren't stupid and want to know what their braindead parents are doing on the internet.

I really believe it's dangerously naive to believe this is about the children. It's quite obvious why suddenly ominous entities are shilling for age verification, digital IDs, digital wallets, and so on (more is to come). Countries in the EU used to get valuable SIGINT from the US that prevented many serious crimes. They still get it but now they've realized that the US might not always remain aligned with them and panic because they have almost no access to modern operating systems except for buying 0-day exploits on shady black markets. They desperately need to get their foot in the door to get the right surveillance infrastructure going. At the same time, politicians are rightly worried about the influence of bots on elections.

These are the principal reason why governments are suddenly pushing for this. If this was about the children, they'd have done it 30 years earlier. Until very recently, this discussion didn't even exist. It's manufactured.

No, they aren't in place at all. It's the parents' job and vast majority of parents do it fine. Nobody wants the Nanny state you propagate.

Second, if you hand over a chip card, you still need to lock down and tightly control every executable on every machine. How else would you guarantee that kids cannot access content the government deems unsuitable for them?

Third, I still haven't seen a coherent argument why parents shouldn't be in charge of what content their children are allowed to consume. I'm not at all against governments providing free parental control software, for example, or voluntary industry standards similar to the movie ratings.

Finally, "protecting the children" is obviously a pretense. The sole purpose of the push for this is for governments to get the foot in the door of operating systems they currently can't control well. It's the starting point for a surveillance infrastructure: age verification -> digital ID verification -> tracking who said what and handing the data over to intelligence and law enforcement.

All kinds of tools and software would need to be locked down or criminalized. Otherwise, some smart kid is guaranteed to get around the restriction and give that method to others, and if it's at school on a USB stick.

This shouldn't even be a consideration concerning adults.