McGrath, I don't think the Letterman producers had any intention to "suppress anything unsuitable for publication or public performance". My guess is that they don't care whether or not Ani DiFranco's songs are performed publicly. They were simply making a decision about what they wanted on their show -- and it IS their show, after all. I can't find any grand conspiracy behind this, as much as it might be gratifying to some to imagine that there is one.

As I said earlier, Ani DiFranco has had no problem airing her views or getting her songs played -- I don't think the corporate media heads view her as any sort of threat. If they did, and they engaged in a calculated scheme to deny her any sort of platform in order to ensure that her songs were not heard by the public, that would be censorship.