When I was around 8 or 9 there was a sign in the school nurses office that said "Speed Kills" I always thought that it meant driving fast. Even though there were little pills in the picture background. I must have been 16 before I figured out what they meant.
A childhood belief about drugs

others believed things like this
- I thought for the longest time that a No Standing traffic sign meant no person should stand near that sign.— Shannon
- A billboard sign read: Moonshine kills.
I thought being caught outside by the moon would kill me. Humph.Anon - I used to think 'To Let' on disused office buildings meant they were big toilets.— Tracey
- I thought that the sign "!" meant: "look at the wonderful landscape"— Giorgos
- I thought that the "don't walk" sign at crosswalks meant to run across the street as quickly as possible!— richard
- I thought that a person's motorskills meant how good they were at driving!Anon