They already are, and it is legally required that they do so, as are libraries. https://www.fcc.gov/consumers/guides/childrens-internet-protection-act https://

They already are, and it is legally required that they do so, as are libraries. https://www.fcc.gov/consumers/guides/childrens-internet-protection-act https://www.fcc.gov/consumers/guides/childrens-internet-prot...