From explanations given by the Chinese government for why certain artists and celebrities are banned from entering or performing in the country.

Behaving badly in social life
Associating with counterculture
Using profanity in lyrics
Wearing a sunflower dress onstage in Taiwan
Scheduling to appear at and then pulling out of a Free Tibet concert
Shouting “Tibet, Tibet” at a concert in Shanghai
Voicing support for the Dalai Lama
Meeting with the Dalai Lama
Taking a picture with the Dalai Lama
Sending the Dalai Lama a birthday tweet
Filming oneself holding a Buddha-shaped cookie to one’s face while squinting
Pulling slant eyes while posing for a photograph
Attributing a 2008 earthquake in China to bad karma
Appearing in Seven Years in Tibet