well, Mikefule...if they are truly "in the idiom", then followers of 'folk' harmonica will no doubt be glad to hear them, and may well adopt them....and someday you MIGHT hear them by someone who doesn't know the author, thus beginning the process of becoming folk/trad....but I'd think full membership for a tune only comes when lots of people play it, but few know the origin. (This may be easier with intstrumental tunes than lyrics, which are easier to research and document).

It is not a real big deal unless you WANT credit for your tunes, and would rather, like songwriters, get royalties..etc...while you're here.

My concern is that some songs do not SOUND trad, and yet get included in 'folk' presentation, to my consternation.