By: Count Krakovich, Asshat Vampire
Bleh!
It’s true, 3.5 readers.
Vampires do not cast a reflection.
Put a vampire in front of a mirror and he/she will not appear in said mirror.
Ergo, if you go look at your mirror and you do not see a vampire then look out! That means there’s a damn vampire behind you!
Or is there?
Yes, you laugh but now you’ll always wonder if you’re not seeing someone in the mirror because there is no one there or because there’s a vampire behind you.
Muah ha ha! Muah ha ha! MUAH HA HA! I’ve ruined your mind!
Wait. What? You’d still be able to turn around in order to see if a vampire is in the room with you?
Bah. You figured it out. I’m such a douche-pire.
Bookshelf Battle 
I’m definitely staying out of a carnival fun house of mirrors – no matter where you turn there’s always a distorted reflection and no vampire which sounds like the perfect place for them to lurk!