Exposing children to pornography is illegal federally and in all states, treated as distribution of obscene material or child exploitation with no parental exemptions. Federal law (18 U.S.C. § 2252) prohibits such exhibition to minors under 18, carrying severe penalties like imprisonment.
So precedent exists. Social media is at least as harmful as porn.
Has anyone ever in life been prosecuted for allowing their teen watch boobs on the internet? I mean if you at any time prior to 18 have a computer in their room you absolutely know that you basically provided an adult portal.
Before the internet as I kid I rewired our houses cable wiring and stole my dad's dirty magazines. Pretty sure damn near everyone saw adult material prior to 18.
So precedent exists. Social media is at least as harmful as porn.