Just in time for Chinese New Year, when millions of young Chinese will travel home and the single ones will inevitably be bugged by relatives about if or when they’ll tie the knot, China’s Internet regulator has decided it’s time to crack down on dating websites.

Earlier this week, China’s official news agency Xinhua reported that the Cyberspace Administration of China released a statement saying fraud is rampant on online dating platforms and has become a “public nuisance to millions of users.” The statement also said prostitution...