Should there be “listed songs”?

And a law passed to ensure they retain their original features and that other artists are forbidden to tamper with them? I’ve often thought that Ronan Keating should have faced prosecution for his hideous cover of “Fairytale of New York” and I felt the same way about “Family Affair” – Sly Stone and nobody else. Ever. Then I heard Gwen Guthrie’s very different cover version and now I’m not so sure.