'Why bother - the folkies have naused the scene up so much nowadays that it would be a total waste of time - hard to imagine a legal team willing to take on such an enterprise - proves nothing Bounty.
Proof of how far down the pan folk has desended is to be had from your own list:
"from bluegrass and Americana, traditional song, new songs written in a traditional style, folk/rock etc etc."
All that's missing from your list is heavy metal at one end and Wagner and Mahler at the other to make it a full definition of "music"
Pretty fair evidence that 'Holby City' and 'Lewis' have more to offer than a night at a folk event, I'd say.'

Oh Jim, I've got to take you to task on that one,
firstly, I was not of course expecting a response from Lighter or MGM Lion, but it was to illustrate the point that the definition of 'Folk' has moved on from 60 years ago.
Secondly, do you really not see that if everyone took the same negative view that you express above, the music you have worked so tirelessly to protect and preserve will die. Fortunately, the majority are (from the clear evidence of clubs and festivals) happy to accept a wider definition and as long as there are people performing traditional songs as part of that wider mix then those songs will be preserved.

John