I wonder if alcohol is a better parallel than smoking here. A vice that you speak with children about and make sure that any relationship they have with is a healthy one.
You can leave children to discover it on their own or you can talk them through what it is, what it can do, etc.
I had a close friend who came to drinking later than peers, but then hit it hard. He became absolutely unbearable with almost any amount of alcohol. Might've been a personality thing or predisposition to it, but felt like the circumstance of him starting drinking harshly like he was making up for lost time was a catalyst.
I agree that alcohol would be a better parallel here and I was simply using the parent comment's example.
Alcohol is considered a vice and we not only have laws which prohibit children from its consumption, at least in the US, it's culturally accepted that it's generally not appropriate for children to be drinking. In the US, I do think that straight prohibition-style banning of all alcohol from children is also not a good idea largely due to the example you've given where once children become adults and have free access to alcohol, their lack of experience with the substance can cause issues.
I'm personally planning on letting my children consume small amounts of alcohol while they are under our supervision to give them experience. That way, once they do have free access, the novelty is not so great and hopefully they'll be able to behave more responsibly. Treating social media as a vice doesn't have to mean full ban until they're adults. It just means we need to acknowledge that it is and think about how we want to deal with it.
You can leave children to discover it on their own or you can talk them through what it is, what it can do, etc.
I had a close friend who came to drinking later than peers, but then hit it hard. He became absolutely unbearable with almost any amount of alcohol. Might've been a personality thing or predisposition to it, but felt like the circumstance of him starting drinking harshly like he was making up for lost time was a catalyst.