We need to simply take away children's access to the unfiltered internet, and we need this to be done by local device parental controls - children get iPhones that allow only a whitelisted part of the internet. We adults need to enforce it and make it a social norm, like you don't buy cigarettes for kids. Then this mass surveillance "for the children" concept can go away, and also the children really shouldn't be exposed to certain information, which we all know it when we see it, until they are old enough.