From "Zen and the Art of Debunkery" by Daniel Drasin
complete list of debunker's tools at:
http://www.tcm.phy.cam.ac.uk/~bdj10/scepticism/drasin.html
Selected Tools of the Determined Debunker:
1. Label any poorly-understood phenomenon "occult," "fringe," "paranormal," "metaphysical," "mystical," "supernatural," or "new-age." This will get most mainstream scientists off the case immediately on purely emotional grounds. If you're lucky, this may delay any responsible investigation of such phenomena by decades or even centuries!
2. Accuse investigators of unusual phenomena of believing in "invisible forces and extrasensory realities." If they should point out that the physical sciences have *always* dealt with invisible forces and extrasensory realities (gravity? electromagnetism? . . . ) respond with a condescending chuckle that this is "a naive interpretation of the facts."
3. When an unexplained phenomenon demonstrates evidence of intelligence (as in the case of the mysterious crop circles) focus exclusively on the mechanism that might have been wielded by the intelligence rather than the intelligence that might have wielded the mechanism. The more attention you devote to the mechanism, the more easily you can distract people from considering the possibility of non-ordinary intelligence.
4. Engage the services of a professional stage magician who can mimic the phenomenon in question; for example, ESP, psychokinesis or levitation. This will convince the public that the original claimants or witnesses to such phenomena must themselves have been (or been fooled by) talented stage magicians who hoaxed the original phenomenon in precisely the same way.