The so-called "social media" companies in the past have bragged to advertisers and the public about how much they know about their targets, also known as "users". Statements like, "We know more about you than your friends and family."

Now, is this really true. Probably not. It's exaggeration. It's hype

But these companies have learned that a 100% correct is not necessary to make money. For example, if they are correct 80% of the time, then maybe that's good enough

A law that achieves an 80% reduction in youth ad targets might also be "good enough"

The toes getting stepped on belong to the companies

The kids who will still access these companies' websites come hell or high water, the 20%, are unlikely to complain

Complaints come from the companies and those who rely on these companies to make money. Like the author of this blog post, they keep calling a handful of Big Tech websites/app endpoints "the internet"

Their toes are going to get crushed

"Social media" is not "the internet"