Can a 13 year old buy a gun? No. Can a 13 year old create a social media account (by entering a fake birth date)? Yes. Since we know there are minors on social

Can a 13 year old buy a gun? No. Can a 13 year old create a social media account (by entering a fake birth date)? Yes. Since we know there are minors on social media (parents can be blamed to an extent), should there not be a fool-proof way of determining the age of the user before allowing them in?