Religion ain't bad. At least, it isn't bad if the believer doesn't try to impose her views upon others. My faith is harmless if I keep it to myself. Because, when did, for example, a good old praying hurt anyone?
Apparently, the answer is August 6, 2005, when the pilots of the Tuninter Flight 1153 decided to pray instead of following the security protocol in the event of fuel starvation. Sixteen people died.
Obviously it would be unfair to say that they died because of the praying. But it would be safe to assume that following the protocol instead of dumping the controls and praying could have made for a smoother landing, probably reducing the death toll.