Wasn’t there an episode where an employee from a competing station said it stood for CRAP? Maybe the one about the softball game. My memory is faded about it.
Call letters are so random I never made that association. In looking at the wiki and on the net there are a few people asking the same question but I don’t see any verifiable evidence this was the sub text intent of the call letters.
I’ve never known whether it was intentional or not, but since I became aware of the show, it’s always been W-CRAP in my mind. That said, I’ve never seen the carp episode.
I seem to recall when they introduced the Carp one character (Bailey?) asked another (Johnnie?) “What does KRP spell?” The look on the other characters face clearly showed he was thinking “Crap?” until she says “A Carp!”
Funny thing about that episode (called “Fish Story”). It was written by series creator Hugh Wilson, though it’s credited to the pseudonym Raoul Plager. Wilson was getting demands from the network to add more physical comedy and general “wackiness” to the show. He wrote “Fish Story” to be deliberately as ridiculous, over-the-top, and dumbed-down as possible, in the belief that it would demonstrate how those sort of hijinks just didn’t work for WKRP. He was confident that the audience would utterly reject that kind of “cheap, low-brow” comedy.
To his horror, the episode was a huge hit, and has become a fan favorite. To this day, he continues to hate it.