They do exist.
I have just been on the end of an genuine rant by a genuine conspiracy theorist who genuinely believes that the world is secretly run by the New World Order. I didn't think they really existed (The conspirasists that is - obviously the New World Order exist).
He also believes that Jews run the NWO, that members of the House of Lords are practicing their marksmanship in Westminster to defend themselves against the revolution. etc etc etc.
Here was here about 20 mins and paused for breath once.
I just smiled sweetly and glazed over!