Randi outlined some classic "hijinks" executed by preachers and tricksters in order to recruit and convince believers of the supernatural. Peter Popoff and others "heal" people, others use the old "one-ahead" envelope reading trick, and so on.
What religion-based tricks or scams have you all heard of or come into contact with?
Last year a man came to one of our meetings and told us he was convinced of demonic possession by a priest who pulled the following stunt: He brought an egg into the room of a person supposedly "possessed" by demons, and then, after a slight-of-hand switcheroo, cracked a spoiled egg (thought to be the same egg) which was black on the inside. The evil taint of the demons in the room spoiled the egg. This man was convinced; convinced enough to demand response from our group of atheists and skeptics…