I'd like to collect some stories of how creatively they've been used over the years. To get things started, I'll cite a few that immediately come to mind:
- TV Guide in about 1964 ran an article on U.S. call letters, noting, for Seattle, that Perry Como was on KING-TV and The King Family was on KOMO-TV. And just how wrong that was
- On April Fools 1970, DJs switched radio stations. Robert O. Smith, normally KOL afternoons, was doing the morning on KAYO, which he ID'ed as "K-O without the L"
- When KING-AM switched to Top 40 around 1970, Robert O. introduced Carole King songs as "Carole KOL" because to do otherwise would advertise a competitor
- A false DX report was once filed, in jest, of reception of Egypt from the Pacific Northwest on 710 KHz. An ID of "Cairo Radio" and an announcer saying "I'd walk a mile for a Camel" were the "positive IDs" reported by the DX'er