If any studio-run organization deserves to be unpacked and interrogated, it’s the Motion Picture Association of America, which doles out movie ratings, so any adversarial documentary on the subject is welcome. This piece of invective by Kirby Dick (Derrida, Twist of Faith) is watchable and sometimes enjoyable, but it skates too quickly over the MPAA’s pro-Hollywood, anti-independent bias and its preference for violence over sex as appropriate fare for children. Instead Dick focuses on the anonymity of the raters, making elaborate efforts to expose them; the ensuing high jinks yield some easy laughs, but there’s not enough consideration of the public gullibility and passivity that help preserve the MPAA’s monopoly. NC-17, 97 min. (JR)