Activist

An activist is an individual who seeks to bring about social, political, economic, or environmental change. They have also been referred to as "occupiers", as in occupying Wall Street. Activists may effect change either through rallying others to their cause, or by taking more direct action, such as protesting a specific institution or occupying space at a facility that advocates the subject the activist is in opposition to.

True Blood
In True Blood, vampires who have "come out of the coffin" seek to have their voices heard in the halls of congress and have lobbied for the creation of the Vampire Rights Amendment.
 * True Blood: Who Are You, Really?: A female activist with pink streaks in her hair opposes the Louisiana governor's hardened approach towards Vampires. Believing that vampires deserve equal rights with humans, she expressed her contempt by throwing a blood bag at the governor, striking him in the chest.