War Movie Frustration
It is not surprising to hear about soldiers annoyed about Hollywood depictions of war. Movies and shows can never replicate the real deal. Of course, they can still enjoy action films, though they can clearly see the absurdities.
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Whistling In The Loo
If you use a public bathroom and you hear the person in the next stall whistling, there is a good chance they were or are a soldier. The history of this tradition remains a mystery but it is still a widespread military practice.