while looking through the newsweek archives, i found an article under which he was chosen first to do the voice of darth vader on star wars. but, they said it would have been too recognizable.
that's another reason why they never should have been afraid. his voice was, and still is, recognizable.
p.s. i still say it was because they weren't listening to the damn words. no matter what wars etc. they had just returned home from.