Guest Quandary, you said:
"Why, oh why, is it in the 'folkish' world we inhabit - is it okay to sing and perform appallingly and think (or not realise) that it is "only fair" that everyone gets a turn - so long as we are keeping the tradition alive or everyone is entitled to a chance . . . Would any other profession put up with dismal or nonexistent standards?"

Two things on this: it happens in any genre where people are allowed to get up on a stage without being vetted first. Have you ever gone to an open stage at a comedy club, or an open jam at a rock, blues, or jazz club? Also, the profession of folk music DOESN'T put up with dismal standards. The performers you describe will never have a professional gig.

Since you are charging musicians to play, you are getting exactly what you are asking for. All the "professional" musicians I know laugh at the concept of paying to play. Why not just stay home and play? Are you really surprised you are getting acts that can only get on stage by paying for the honor?

John Peekstok