Good points. It's like websites with an age-gate: technically they're trying to keep out users under a certain age (usually minors), but there's no verification.

But we all need to remember that "protecting the children" and clutching our pearls is still not a good reason to let world governments and giant corporations create laws, demand our papers, keep massive databases of our data, and tie our real-world identities to our online ones. It will be the end of anonymity online, they'll use it for evil, and it will get hacked...