Whistler

Someone was just whistling in the hallway outside my office, which made me think of this story.
One time I was in a store and another customer was whistling and this guy freaked out, he was walking through the store saying "Who is whistling...its bad luck to whistle!". He was so disturbed by the whistling that he walked out of the store. I could see how it would maybe be annoying to listen to someone whistle, but I doubt it is bad luck.
My dad and brother are whistlers. I hardly even notice when they do it around me.