Miscreants will no longer be welcome aboard China’s trains and aeroplanes from May 1 onward. A record of misdemeanours such as spreading false rumours about terrorism, creating a ruckus on flights, smoking on trains or using expired tickets will land you on a travel blacklist, as reported extensively over the past week. A laudable move, you might say—but this is only a tiny part of an unprecedented exercise in totalitarian control where the Communist Party will put the lives of every one of its subjects under the microscope as part of the so-called Social Credit system.