A slippery slope, indeed, that could be applied to virtually any activity that doesn't meet with the government's approval.

China to bar people with bad 'social credit' from planes, trains
Reuters | Mar 16, 2017
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SHANGHAI (Reuters) - China said it will begin applying its so-called social credit system to flights and trains and stop people who have committed misdeeds from taking such transport for up to a year.

People who would be put on the restricted lists included those found to have committed acts like spreading false information about terrorism and causing trouble on flights, as well as those who used expired tickets or smoked on trains, according to two statements issued on the National Development and Reform Commission’s website on Friday.

Those found to have committed financial wrongdoings, such as employers who failed to pay social insurance or people who have failed to pay fines, would also face these restrictions, said the statements which were dated March 2.

It added that the rules would come into effect on May 1.

The move is in line with President’s Xi Jinping’s plan to construct a social credit system based on the principle of “once untrustworthy, always restricted”, said one of the notices which was signed by eight ministries, including the country’s aviation regulator and the Supreme People’s Court.