When I was in the 7th grade, the girls at my school would be playing those infamous mirror games like "Bloody Mary", one about seeing the Witch from Snow White, and one about some incantation to summon the devil.
I developed a slight fear of mirrors and was very happy I did not have a full length mirror in my room.
I would stay awake in fear of the devil. I would even get teased about it by friends.
Though I do have two in mine now since I'm vain, I still keep an open box with a cross on a chain AND a lion plooshie with a Star of David just in case.
A childhood belief about mirrors

others believed things like this
- I believed that if I looked too long in the mirror admiring myself the Devil would appear.— Paul Elletson
- If you stare into a mirror in almost complete darkness, the devil will appear instead of your reflection.Anon
- I had a fear of seeing a person in the corner of the mirror(most of the time a morlock)— Shane
- When I was a kid I thought Mary had a little lamb whose FLEAS were white as snow.— jen
- when i was young i used to believe that my image on a mirror would come to life if i broke the mirror.Anon
- I thought the lyrics to "Don't fear the reaper" were "Don't fear the reefer"— who new?