We’ve had age verification for decades. It just depends on specifically what is being verified. Congress passed Children’s Online Privacy Protection Act back in 1998, that basically made it extremely tedious for websites to serve children under 13 years of age. How did everyone manage this in the early 2000s? Every child simply lied to the website with an incorrect birthdate. Now that was before real name policy was instituted by social networks and it was also common for people to provide a false name to websites. This approach of “asking the user for a birthdate and accepting it as true” is the only age verification method that’s sane.