My oldest son believed that if you went outside without your shirt on the police would arrest you. We figured out later that he had been watching "Cops".
A childhood belief about police

others believed things like this
- I used to believe that if you did not keep your shoes tied, that the police would arrest you.— Kelly
- My mom threatened that if I didn't eat all my vegetables that the police would come and arrest me.— Lisa T.
- I thought the song "Karma Police" was actually saying "call the police" before I learned the title— Alberto Richardson
- When I used to see the sign 'police accident' I thought it meant that a police car had crashed.Anon
- I used to believe that undercover cops hid under covers/sheets. — Holly
- I used to believe the oldest person in the world was 214. — Imaginative_Kidd