Brian Knappenberger’s We Are Legion: The Story of the Hacktivists is a lot of things, but first and foremost it’s an outstanding example of documentary filmmaking done perfectly; it’s exciting, it’s propulsive, it’s entertaining, and it’s insightful. Documentaries should be educational and thorough as a rule, and We Are Legion doesn’t disappoint in that respect, but Knappenberger’s film– despite all of its historical and academic value– regardless manages to carry out its purpose with tongue firmly in cheek. And maybe there’s a point to that. After all, there’s something intrinsically bizarre about the idea that Knappenberger’s subject, the online, multi-faceted group of prankster-activists, Anonymous, actually has become a genuine catalyst for…