BTW, I may have missed something but if it was my

"it might be worth pointing out factual errors, if for no other reason than to try to avoid the next dose of wrong information on Mudcat when a song thread crops up."

That sparked this off, I'm once again mystified by the powers of Mudcat. There is nothing there that suggests reworks must by wrong, that people (including me) may not like just a set of words to sing to, demands for "purity in song" etc. But the replies seem to read as if I'd suggested otherwise.