Probably so. Just another flaw.

If MP and FFC knew then that 30+ years later people would be able to watch these movies over and over again in their own homes, and that there would be maybe, I dunno, 100 or more people on an internet forum (hell, they didn't even know that there would be an internet, either) who all considered themselves to be experts on the films and were willig to discuss them and analyze them endlessly, I think they quite possibly would have been more careful.