Yes, I doubt MGM could be held liable. For 1. the "miss-representation" of widescreen to pan&scan is on the inside of the packaging and not viewable from the outside, and 2. Just because the movie was shot in open frame, does not mean it'll have the same width as the wide-screen version. For instance with Robocop, Paul Verhoven (or so it seems) wanted the movie released in open-frame which is 1.66:1, however the widescreen version had cropping on all four sides of the frame in many instances.