A more appropriate route to that is to create incentives and grants for companies to be created that can accomplish this age verification infrastructure (ideally with its own privacy guarantees, etc), and make a declaration such as “in 5 years, you will be expected to validate and track the age group of all users on your platform. We have created grants to help create technology companies and a platform that will help to implement and privatize this service”.
That way you get both:
* companies that can provide the service (yay capitalism, middlemen and jobs!)
* compliance with the new laws that help to stratify users so that < 18 and > 18 users are identified and segregated.
That way you get both: