When I was younger, I thought that stores that displayed Help Wanted signs were encouraging people to help criminals wanted by the law. I always felt very roguish shopping at these stores.
I didn't realize that the signs meant that the store was hiring until I was about 10 years old.
A childhood belief about criminals

others believed things like this
- Up until I was 17 I thought that 'no outlet' signs meant that the steet didn't have any streetlights.— Kelsey
- As a kid, I thought "No Outlet" signs meant the houses past that point didn't have any electrical outlets.— Julie
- 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 people that worked in stores slept right there on the floor and lived there. Anon
- I thought the "To Let" signs on buildings meant they were public toilets.— Scottish Laddie
- When I was a kid, I used to believe that the "ped x-ing" signs meant "pediatrician crossing."— Jessica