It's a good point Steve. Tunes are used and reused all over the place and this further blurs the lines of "what is folk?". Would those objecting to pop songs rail against someone singing The Seekers "The carnival is over" at a folk club? It is a pop song that uses a traditional Russia tune. Is Simple Minds' "Belfast Child" a pop song or does the tune make it folk? Does putting a folk song in the charts make it pop? Those trying to dictate rules have their work cut out!