Imagine how the comments in a WorldStarHipHop or YouTube post would look if the users had to use their government names. If you lived in the People's Republic, you wouldn't have to imagine too hard. At the end of 2012, China passed a law that requires Internet users to register their real names.
The law was passed after Chinese officials found themselves in the midst of numerous scandals, including one where an official was filmed on tape having sex with a 18-year-old girl. After the video was viewed on sites like Weibo (considered to be the Chinese Twitter), there was a flood complaints about the abuses of power by the Communist Party leaders.
China claimed the law was meant to strengthen the protection of personal information, but many see it as a way to keep a closer eye on those with dissenting opinions of the government.