I would say the best compromise would be something along the lines of having to send them government ID (which brings up a whole other ball of wax with privacy/

I would say the best compromise would be something along the lines of having to send them government ID (which brings up a whole other ball of wax with privacy/data retention issues) - most teenagers might get a drivers license at 15-16 which I would subjectively say is close enough to adulthood to avoid these literal popularity contests online.