Ratings Blinders

I recently learned that all of the light cues in a multiplex (dim Lights, lights out, lights up) are encoded on the film itself and read by the lighting system. You could take this idea one step further, and put meta tags on a film. a reader would translate them, and send a signal to special glasses/earphones to shield the user from that which he does not want to see.

For example: an arachnophobe, a prude, and a movie critic sit down with ratings blinders to watch Martin Lawrence vs. The Spiders from Mars. Spider tags alert the ratings blinder to darken the arachnophobe's glasses whenever the Spiders appear, Language tags silence the prude's headphones whenever Martin Lawrence speaks, and Bad Movie tags shut the movie critic out completely, letting him catch up on his sleep.