Insane Clown Posse filed a federal lawsuit in Detroit, alleging the U.S. Justice Department acted unlawfully by classifying its fans as a gang. The Detroit News said four of the rap-metal duo's followers, known as Juggalos, are also plaintiffs in the lawsuit, which names the Department of Justice and FBI as defendants. Filed by the American Civil Liberties Union of Michigan, the lawsuit also wants to block the government "from taking action in the future that would brand Juggalos, as a group, as a criminal gang based on the actions of a relatively few people who may identify as Juggalos," the News said Wednesday's filing reads.