China's "citizen scores" used to blacklist 6.7m people from using high-speed rail or flying

China's nightmarish "citizen scores" system uses your online activity, purchases, messages, and social graph to rate your creditworthiness and entitlement to services. One way your score can be plunged into negative territory is for a judge to declare you to be a bad person (mostly this happens to people said to have refused to pay their debts, but it's also used to punish people who lie to courts, hide their assets, and commit other offenses). (more")