When I was a child I used to believe that all adults (as well as any child who wasn't my friend) were actors and were secretly spying on my life (kind of like the Truman Show). I thought that this "spying" was how certain adults such as teachers knew personal details such as my full name and home address.
A childhood belief about being watched

others believed things like this
- when I was little, I used to think that everyone was a child but someone invented adults to take care of us.— chocolate
- I thought cartoons were for kids and "real-life programs" for adults.— Ichigo
- That adults came into the world as adults and were never childrenAnon
- That boys turned into women when they became adults and girls turned into men when they became adults. Anon
- I used to think that I was smarter than adults. Now I know kids are smarter than adults in many ways— Marshall M
- As a child I used to think that actors really died in movies.— Jordi Comendador