Interesting choice of word." KOOK", "A person who's actions are strange or foolish" MERRIAM-WEBSTER Dictionary, or "One who's ideas or actions are,eccentric ,fantastic or insane", you choose, personally I prefer,
http://dictionary.die.net/kook..... "A term used to describe a poster who posts messages with no grounding in reality,the kook trademark is paranoia and grandiosity. kooks build up imaginary support structures and act as if its real even after its falsity has been documented" seems to be about right