Hey, once I'm rich and famous, I might be offended by things like that.

And I DO think there's a difference between poetic songs and folky-type songs. Most people wouldn't screw with a Dylan song, or Leondard Cohen. Even the folky songs would have less of a chance of being changed because the original is a matter of public record these days. That hasn't stopped people from creating different versions of Ewan McColl songs, for example.