Any reasonably educated child can easily disable all of these "safety features" (e.g. boot the machine at night from USB stick...). These "features" are nothing but placebos for parents too incompetent to educate their children.
Although I'd recommend being a responsible admin/parent in that case instead and, with the _correct_ infrastructure for this scenario already in place, define filters for things you don't like or white lists for things that are okay for your network, instead of begging the internet to correctly guess your moral boundaries.
Spec makes no mention of age groups this is supposed to be used for aside from "children".