Religion has at least one saving grace: it openly relies on an appeal to faith. FlimFlam instead claims scientific respectability, but secretly relies on paranoia and ignorance of the ScientificMethod to gull the rubes.
Also a book exposing such: Flim-Flam! Psychics, ESP, Unicorns, and Other Delusions by James Randi, Isaac Asimov ISBN 0879751983
See Also: TheSecretOfPower.