Superstar Rock Artists/Painters grousing at each other sounds like another a hipster's version of The National Enquirer. I think the plagiarism thing is summed up well by Waylon Jennings 'Don't Cuss the
Fiddle' -

   If we ever get to heaven
   It ain't because we ain't done nothing wrong
   We're in this gig together
   So let's settle down and steal each others songs
   I know it sounds silly
   But I think I just stole somebody's song.

Hope Joni keeps on doing her beautiful painting/creative jazzy/rock.
See also 'Roots of Bob Dylan' website -
    http://bobdylanroots.com/lyric.html
   
voyager