Yesterday, in writing about my disgust with David Letterman for enabling nonsense by having TV psychic Theresa Caputo on his show, I mentioned that Johnny Carson never would have allowed her in his guest chair because he couldn’t stand con artists who prey on people as she does (and too many others do). As I was posting that, James Randi wrote this piece about his friendship with Carson, his most famous appearance on “The Tonight Show,” and how Johnny’s support for the skeptic movement lives on.