Users of Reddit, a social media platform, posted and circulated sexually explicit images and videos of minors online. Parents of those depicted sued Reddit.  This opinion holds that section 230 of the Communications Decency Act (47 USC 230) immunizes Reddit.  While § 230 immunity does not apply to child sex trafficking claims if the conduct underlying the claim also violates 18 U.S.C. § 1591, the criminal child sex trafficking statute, to fall within that exception, the plaintiffs would have to show that Reddit itself (not its users)  knowingly participated in or benefitted from a sex trafficking venture.