Every Facebook user will be assigned a "trustworthiness score" derived from a mix of user complaints and secret metrics derived from spying on user activity on the system (Twitter has a comparable system).

China's Citizen Score system combines surveillance of your social media and social graph with your credit report, your purchase history and state spy agencies and police files on you to produce a "trustworthiness" score — people who score low are denied access to high-speed travel, financial products, and other services like private school for their kids.