Fellow Ball State University graduate David Letterman and I crossed paths once. Just once. I was a freshman in 1968 and Dave was a senior.
I lived in Wagoner Hall, which at that time was a dorm for men only and was often referred to as the Animal House. I can assure you that it was far tamer than the movie.
Dave and some friends established a radio station in our dorm with the call letters WAGO. The signal was only distributed to dormitories on campus. I remember listening to him on the radio once or twice but I have no memory of what he said on air.
One of his fellow radio and television students lived in Wagoner and Dave used to come visit him on Friday and Saturday nights. They would call long distance operators around the country to ask them goofy questions and to flirt. My good friend Dave and I passed each other in a dorm hallway one night as he was en route to visit his buddy. We did not speak. That's my story and I am sticking to it.