Sarah Wynn-Williams

Whistleblowers & Insiders · Facebook (Meta)

Former Facebook policy director whose memoir and Senate testimony detailed how ad targeting could reach teenagers based on their emotional state.

Sarah Wynn-Williams was Facebook's director of global public policy before becoming one of its sharpest insider critics. Her 2025 memoir, Careless People, described the company's internal culture and decision-making around growth and safety. In Senate testimony that April, she detailed how Facebook's ad systems could target teenagers based on inferred emotional states, raising alarm about how commercial incentives shaped products used by children. Her account added a policy-side perspective to the wave of Meta whistleblower testimony, focused specifically on how advertising business models intersect with young users' wellbeing.