I remember I used to go to xtian chat rooms in IRC and for them I was the troll. I used to get kicked out of the room almost every time for trying to combat their fairy tales with rational statements. It was fun though, to read the crap they could come up with.
Christianity: The belief that a cosmic Jewish Zombie who was his own father can make you live forever if you symbolically eat his flesh and telepathically tell him you accept him as your master, so he can remove an evil force from your soul that is present in humanity because a rib-woman was convinced by a talking snake to eat from a magical tree...