Pennsylvania Attorney General Dave Sunday filed suit against TikTok this week in Allegheny County court, accusing the platform used by nearly 100 million Americans daily of misrepresenting itself to parents and regulators alike. The core allegation is that TikTok claims mature content is rare enough on its platform to justify a 13-plus age rating in app stores, while teenagers on the app regularly encounter profanity, drinking, drug use, and sexually suggestive content anyway. “That age rating gives parents the illusion of safety but actually opens the door to putting content literally in the palm of our kids’ hands whenever they want it,” Sunday said.

The complaint doesn’t stop at content misrepresentation. It also accuses TikTok of deliberately engineering the platform’s infinite scroll to be addictive for young users specifically, arguing the company understood the psychological cost to teenagers and built the feature anyway because it drives engagement and ad revenue. Sunday’s office points to internal awareness as the crux of the case. Not that TikTok couldn’t have built in better guardrails, but that it chose not to. Dr. Candice Biernesser, a University of Pittsburgh psychiatry professor, offers a more measured read on the underlying science: there’s no firm documented evidence that social media itself causes addiction, she says, but there are specific features teens consistently describe as difficult to disengage from, and better moderation for younger users is achievable without abandoning the platform’s core function.

TikTok’s response leans on the safety infrastructure it’s already built, including 50 preset safety and privacy settings on teen accounts, Family Pairing tools that give parents direct control over screen time and content filters, and calls the lawsuit “misleading and inaccurate” and vows to fight it. Sunday’s counter is that those controls are easily circumvented by the teens they’re meant to restrict, which is really the crux of the dispute. TikTok argues it built the tools, Pennsylvania argues the tools don’t actually work at the scale or with the rigor the company claims.

States across the country are starting to go after social media platforms like TikTok for many of the same claims. Just last week, a New Mexico judge ordered Meta to pay $567 million and implement a specific slate of product changes like hidden like counts, nighttime notification limits, and usage caps for minors after finding the company’s platforms contributed to a documented youth mental health crisis, in a ruling that compared Meta’s design choices to industrial pollution. Sunday has explicitly framed Pennsylvania’s TikTok suit as the first move in a broader campaign, not a one-off action. He’s previously sent demand letters to AI chatbot companies over harm to young users and says more litigation against other platforms is coming. Two different states, two different platforms, the same underlying accusation: these companies know their products cause measurable harm to kids and have chosen growth over guardrails anyway.

That pattern keeps building, and it’s largely because Congress has spent years failing to pass comprehensive federal legislation regulating how social media platforms treat minors, despite bipartisan agreement that a problem exists and years of hearings featuring tech executives promising they take it seriously. In that vacuum, state attorneys general have become the de facto regulators of platform design, filing lawsuit after lawsuit under consumer protection statutes never written with algorithmic engagement loops in mind. It’s a tricky legal system to navigate because this whole industry is so new, leaving Sunday to sue under the same kind of law that normally covers false advertising, applying it to an entirely new category of harm because it’s the tool available, not necessarily the one built for the job.

The upside is real accountability now, rather than waiting for gridlocked federal action that may never arrive. The downside is exactly what critics of the New Mexico ruling flagged: a state-by-state patchwork means a kid in Pennsylvania and a kid in Ohio could end up with entirely different protections, dependent on whichever state’s AG decided to sue first and which judge happened to hear the case. Sunday’s own framing that this is “just a first step” is an admission of exactly that limitation, a promise that more piecemeal action is coming because no comprehensive alternative exists.