I have 3 teenagers and none of them have smartphones. They have no unfettered access to the internet in my house. I cannot think of a worse idea than a teenager with a camera and a wide-open internet connection. Some day they will have those things. But not today, Satan.
You can have parental control on iPhones and macbooks. I don't see the issue as long as you limit the screen time and whitelist only useful stuff. Use next DNS on your router.
> I cannot think of a worse idea than a teenager with a camera and a wide-open internet connection. Some day they will have those things. But not today, Satan.
What's the worst that will happen?
Porn? Twitter? 4chan?
All you're doing is encouraging them to hide things from you.