China is one of the most censorious societies on earth. So what better place for Facebook to recruit social-media censors? There are at least half a dozen “Chinese nationals who are working on censorship,” a former Facebook insider told me last week. “So at some point, they [Facebook bosses] thought, ‘Hey, we’re going to get them H-1B visas so they can do this work.’ ” The insider shared an internal directory of the team that does much of this work. It’s called Hate-Speech Engineering (George Orwell, call your office), and most of its members are based at Facebook’s offices in...