We lived in a very rural part of Pennsylvania where there were no red lights, only stop signs. Someone told my older sister that the stop signs with white around the edge meant that stopping was optional at them. Well, all stop signs have white around them but she believed them until after she was old enough to drive.
A childhood belief about road signs

others believed things like this
- Having seen enough red octagonal STOP signs in my time, I used to look out for green circular GO signs.— Gary
- I used to believe that the sky had stop lights and road signs floating about for the airplanes.
— LoonaSM's - I used to think that Mice controlled the Stop lights and crosswalk signs.Anon
- When I was a kid, I used to believe that the "ped x-ing" signs meant "pediatrician crossing."— Jessica
- I thought the "To Let" signs on buildings meant they were public toilets.— Scottish Laddie
- i used to believe that the no outlet signs meant that noone in that section of the street had electricityAnon