This might have the benefit of reversing the trend where everything on the internet was rolled in to social media. If social media is age restricted, news, announcements, etc will have to break out to dedicated websites if they want to be accessible by all ages.

just ban kids from the internet already. if a parent allows the kid to have a full function smartphone and the kids get caught with it then throw the parents in jail and kids in an orphanage. people will catch on.