"The Economic Argument"
http://xkcd.com/808/

OTOH, "some" people *do* make a very good living off these things - by hoodwinking other people. (See Peter Popoff, e.g.)

"The first principle is that you must not fool yourself--and you are the easiest person to fool." -- Richard P. Feynman, "Cargo Cult Science."

http://www.lhup.edu/~DSIMANEK/cargocul.htm