I used to get disgusted; now I try to be amused.
There are some good points being made on this thread, along with some of the usual garbage we've all had to learn to tolerate. UB Dan's point about hyperbole is well taken -- I really don't see a huge threat to my freedom of speech here. Frankly, nothing that occurs on the Letterman show is really very important; it's light entertainment for people who have trouble sleeping, nothing more.
If the enormous media conglomerate that controls all our lives is really trying to censor Ani DiFranco, they're doing a pretty poor job of it. I hear her on the radio, see her CDs in the stores, read interviews with her in magazines, and have grown familiar with her outspokenness in many forums. She's a smart lady and an effective communicator, and she seems to be getting her message across pretty well, despite the vast media conspiracy that trembles at the thought of letting her opinions out in the open where they might radicalize the rest of us.
Of course, that's not what I really think; it's just the Prozac talking.