@drwhax there's a direct US civil rights reference here, DJ Playboy in Birmingham, Alabama circa 1963. "James Bevel also wanted to use local radio stations to get the word out on protest day. He talked to Shelley as well as another local disc jockey named Paul White. His radio audience knew him as “Tall Paul.” Shelley says on May 2, 1963, he and “Tall Paul” announced the start of the children’s march. But, they did it in a roundabout way. They used codes."https://www.apr.org/arts-life/2016-08-04/civil-rights-radio-part-3-they-told-the-teachers-were-gone