People who present, very calmly and matter of factly, that the "all morality comes from God," argument. Extra creepy if they allude to "how awful/immoral they were without God: but they're Christian now."
Oh, great. Makes you really want to hang around to see what they do if they have a faith crisis.
Oh, great. Makes you really want to hang around to see what they do if they have a faith crisis.