A Chinese woman posted a tweet indicating she would march holding a banner to honor Nobel Peace Prize winner Liu Xiabo, Liu happens to be in prison.
Authorities who wanted to send a warning to friends and supporters of Liu made a visit to her home. She had to leave with them. When she returned home, the authorities retained her phone and computer.
"China Snatches Woman After Protest Tweet for Nobel Winner Liu Xiaobo", The Huffington Post, 10/29/2010.