The harm hasn't been adequately demonstrated though. Whereas we know cigarettes are harmful to everyone.

Alcohol in the UK can be consumed in the house from 5 years old. Which is the point. That societal norms at work. Everyone knows it's not ok to let your young kids get drunk, but we trust society to let parents decide what is appropriate and when.

Following the same analogy, they can use parent’s phones to access social media under supervision.