In the late sixties, the hottest comedy writing team in Hollywood was Phil Hahn and Jack Hanrahan, two former MAD Magazine writers who had moved on to work for shows like Get Smart and Rowan and Martin's Laugh-In. They had split up by the time I got into their line of work but I got to know both men individually and found them to be two of the wittiest men in a business full of witty people.
Here, on the website for Cleveland Magazine, we find a reprint of a 1976 article on Hanrahan. It fingers him as the man responsible for making his home town into the butt of so many jokes. I'm not sure he deserves credit/blame for that but the rest of the piece has some good info about the backstage mood of TV shows back then.