This is the full, uncut interview from the documentary The Enemies of Reason. Richard Dawkins discusses psychics and skepticism with Derren Brown.
I can see the entertainment value in visiting a tarot card reader or a palmist with some friends for some fun, while not taking any stock in what the psychic says, but it quickly turns into a disgusting and dangerous act when people start to pay these crooks in a desperate attempt to speak with a dead loved one or use their advice for health problems, in the form of alternative medicine.