Massachusetts’ highest court heard arguments accusing Meta Platforms of designing features on Instagram and Facebook to encourage addictive use among teenagers. The state’s suit, brought by Attorney General Andrea Campbell, focuses on product features—notifications and endless scroll—not content moderation, and relies on Meta’s own internal research as evidence. State lawyers argued features were intentionally engineered to exploit teenage fear of missing out; Meta countered that the claim would improperly regulate protected speech and publishing functions. Judges probed the line between content and engagement mechanics during oral argument. Universities should track the case because outcomes could prompt new legal standards governing platform design, with downstream effects on student mental‑health initiatives, campus digital‑safety policies and vendor contracts for social‑media partnerships. Clarification: the litigation targets platform design elements and seeks liability based on user‑engagement mechanics rather than allegations of false speech.