Naked Cowboy Sends Cease And Desist Letter To Naked Cowgirl

Who knew that street performers could copyright their shitck acts where they panhandle for a few coins laying a hat on the sidewalk? But New York's street performer, the Naked Cowboy has sent a cease and desist letter to some woman who bills herself as the Naked Cowgirl claiming copyright infringement of a registered act. I don't recall the Naked Cowboy ever performing on TV. I don't recall him ever playing a tour across the nation. I don't recall him ever being billed at Las Vegas. Is being a street performer a legitimate and copyrightable act?

At Disneyland you have to be so tall to ride some rides. Shouldn't a street performer act have to so good before it's considered a legitimate act and not just some panhandling screwing around.

Hey, I get some skidrow guy who comes in my grocery store, mumbles when he returns bottles, cuts his hair cut like a Dutchboy, wears women's beads and pisses his pants. Can he copyright that shitck if another guy would steal that act?