This is a problem with the internet....How does one validate age?
The not selling to minors is addressable like with UPS and a requirement to provide age verification & signature for the reciepient at a cost.
But the locking of the site can only be accomplished by using the account authorization prior to being allowed to see the content. Then it is up to the site manager to approve accounts before activation and they can request any validation that they want.
Not very automated I know.



