Social Media Ban For Under 16's

Denmark is the latest country, joining France and Australia, to be mulling over a social media ban for under-16s and while the UK has not committed to do the same, they have tellingly refused to rule it out and i agree that is is something which has some serious merit.
The Danish government previously announced it would ban mobile phones in schools and after-school clubs and has now taken a further step and is proposing a ban on several social media apps for under-15s, saying 'We have unleashed a monster'.
In the UK, the Online Safety Bill was introduced where internet and social media companies now face fines of up to 10% of revenue if they allow young users to see harmful content with age restrictions placed on adult content.
Nobody yet has come up with details on how a ban would be enforced, it can't just be banned because it still needs to be available to everyone over 16 to use it but i can foresee how the problem should be passed onto the providers to make sure nobody under 16 is accessing their apps, or face a huge fine.
It makes sense to restrict access to potentially harmful content and i am sure that there are many other countries just waiting to see just how it is implemented before joining the crusade against kids accessing social media sites.