Belief In Demonic Possession And Exorcism Causes Real Harm

"I think the question is relevant because we see so many examples of the damage caused by belief in demons and exorcism. We see how such beliefs fueled cruel treatment of the mentally ill, and it should make us nervous that the Catholic Church is still pushing this stuff."

 Link

More "food for thought:"

http://www.csicop.org/si/show/exorcism_driving_out_the_nonsense

Exorcism: Facts and Fiction about Demonic Possession 

We never hear about an atheist being possessed and then healed by exorcism.

A Psychiatrist Falls for Exorcism