As a young child attending Catholic church, I noticed that at the non-Catholic church down the street, two men would roll out a heavily-weighted sign to the middle of the road on Sunday. I thought the sign said "Stop for Protestants". Later, when my reading skills improved, I realized the sign said "Stop for Pedestrians".
A childhood belief about church

others believed things like this
- I thought if 3 cards stopped at a 3-way stop sign then they had to stop forever until Christmas.Anon
- I thought for the longest time that a No Standing traffic sign meant no person should stand near that sign.— Shannon
- i always thought that a DEAD END sign
as where they put all the road kill.
— pav - I used to believe the local Catholic church was Disney Land.— Sherri
- I thought that the "don't walk" sign at crosswalks meant to run across the street as quickly as possible!— richard
- I used to believe the "Yield" from the road sign was somebody's name.— julia