I don't choose weapons for psychological effect either, nor do rack a pump in the room with friends and expect them to react like the BG would. I did recently experience something a bit more realistic. At a pretty noisy gun show a dealer answered a customers question as to whether there really was any psychological effect to the racking of a 12 ga. pump by clipping the tie wrap on a Remington 870. Then without saying a word he raked it. "No one lost control of their bowels or fell down sobbing like a schoolgirl" there either, but there was moment of silence observed involuntarily. I won't say you could here a pin drop, but you could hear the air being let out of a multitude of lungs when nothing followed the rack.
I have racked the action on my pump multiple times with friends in the room, and no one lost control of their bowels or fell down sobbing like a schoolgirl.