Automatonophobia

run screaming out of sears
Automatonophobia is the fear of anything that falsely represents a sentient being; it is a type of specific phobia. This includes, but is not limited to, ventriloquist dummies, animatronic creatures, mannequins, scarecrows, and wax statues. This fear can manifest itself in numerous ways; every individual who suffers from the fear being different.–Wikipedia

sign spinner

mannequin
Mannequin- n. 1.
a styled and three-dimensional representation of the human form used in window displays, as of clothing; dummy.
Two years ago there was a real human spinning the sign, now they have a dummy.