I would like to take the discussion in the other direction. How about we offer safe spaces instead of banning the unsafe spaces for kids.
Similar to how there is specific channels for children on the TV. Perhaps the government can even incentivize such channels. It would also make it easier for parents to monitor and set boundaries. Parents would only need to monitor if the tv is still tuned to disney channel or similar instead of some adult channels.
Similarly this kind of method could be applied to online spaces. Ofcourse there will be some kids that will find ways around it but they will most likely be outliers.
>How about we offer safe spaces instead of banning the unsafe spaces for kids.
Children shouldn't be associating with other children, except in small groups. Even the typical classroom count is far too large. They become the nastiest, most horrible versions of themselves when they congregate. A good 90% of the pathology of public schools can be blamed on the fact that, by definition, public schools require large numbers of children to congregate.