Facial recognition technology is demonstrated on a video screen at the World Internet Conference is Wuzhen, China, on Nov. 7, 2018. Facebook plans to shut down its decade-old facial recognition system this month, deleting the face scan data of more than 1 billion users and effectively eliminating a feature that has fueled privacy concerns, government investigations, a class-action lawsuit and regulatory woes. | JONATHAN BROWNING/THE NEW YORK TIMES