Just found out that at least one of the commenters on William Dembski's ID blog Uncommon Descent not only believes in ID creationism, but also that the moonlandings in 1969 were fake. Is this collusion of delusions in a single person rare or the norm? How can I get a number of how likely people are to believe in two or more of, say, these beliefs:

• Obama's birth certificate is fake
• Moon landings fake
• Holocaust never happened
• 9/11 masterminded by (insert arbitrary intelligence agency here)
• Earth is flat
• Global warming caused by the sun
  
• CIA killed JFK
• Vaccines cause autism
  
• Creationism (includes ID)
• Aliens in area 51
• Astrology
• Divining
• Raping a virgin cures AIDS
• Homeopathy
• Elvis is alive
• UFOs/alien abduction
• Extrasensory perception
• Talking to the dead
• Prayer works
• Illuminati
• H1N1 swine flu caused by homosexuality and masturbation

Since these are all equally ludicrous, someone believing one of them should be more likely to believe any other of them than the general public. As such, there should be a higher proportion of people who believe several of these compared to those that only believe in one but not any of the others. I wonder if there are any statistics on this...