Yangtze Briefing | The thin line between online sleuths and vigilantes
Recent pursuit of Shanghai party member accused of sexual assault overstepped mark by drawing in man's wife and daughter

The mainland's "human flesh search engine" can be a potent tool to expose corruption and injustice. But the army of web users who ferret out details online about people accused of misdeeds can also cross into vigilantism, overstepping the law in their zeal to name and shame.
This happened recently over an incident on a subway in Shanghai, which another passenger filmed with a smartphone. The half-minute clip shows a man seated near a carriage door touching the thigh of a woman who is facing the other way. He touches her twice and turns back to his mobile phone.
The clip was uploaded onto a major video-sharing website on the mainland, and quickly became a local topic of discussion.
The man was identified as Wang Qikang, a member of the Communist Party, and an employee with Shanghai Jinjiang, one of biggest state-run travel-related enterprises. Jinjiang said in a statement Wang had been expelled from the party and sacked from the company. He had been detained by police for "molesting women in public", the statement said. The woman passenger has also filed a complaint with police.
Wang denies he sexually assaulted her, and told police he had accidentally touched her leg while he was falling asleep on the train.
