China has had enough of Paris Olympics-related rows and has begun to crack down on what it considers a “negative culture” of defamation and slander. Beijing authorities are lamenting a growth in online battles led by “fan leaders”, who are attacking athletes and other fans, and manipulating comment sections to spark conflict between fan groups. In the latest controversy, a 29-year-old Chinese woman was arrested after allegedly making defamatory posts about athletes and coaches related to the women’s table tennis final on Saturday between two Chinese competitors, Chen Meng and Sun Yingsha. The …