“These parallel dogmas — free speech and intellectual-property rights — through corporate intervention and governmental abdication, are now on a collision course, and may in fact collide next month with the theatrical release of Kirby Dick’s incendiary This Film Is Not Yet Rated. A jihad against the Motion Picture Association of America, movie studios and the corporations that own them, Dick’s documentary plans to get around the prohibitive costs of copyright licensing by employing a “fair use” defense — a safeguard built into the Constitution but largely untested in the courts. Like the last time a foreign body slammed into the earth’s surface, disrupting gravitational orthodoxy, watch for sea changes, atmospheric gloom and toppling dinosaurs.”