Here’s a fine interview with Roger Ebert. A sample quote:

Q: What do you make of the criticism of Hollywood celebrities for speaking out against the war–the Sean Penns, the Susan Sarandons? Ebert: It’s just ignorant; it’s just ignorant. Q: Why do you say that? Ebert: I begin to feel like I was in the last generation of Americans who took a civics class. I begin to feel like most Americans don’t understand the First Amendment, don’t understand the idea of freedom of speech, and don’t understand that it’s the responsibility of the citizen to speak out. If Hollywood stars speak out, so do all sorts of other people. Now Hollywood stars can get a better hearing. Oddly enough, the people who mostly seem to hear them are the right wing, so that Fox News can put on its ticker tape in Times Square a vile attack on Michael Moore, and Susan Sarandon is a punchline. These are people who are responsible and are saying what they believe. And there are people on the other side who also speak out, and it’s the way our country works . . . There’s an interesting pattern going on. When I write a political column for the Chicago Sun-Times, when liberals disagree with me, they send in long, logical e-mails explaining all my errors. I hardly ever get well-reasoned articles from the right. People just tell me to shut up. That’s the message: “Shut up. Don’t write anymore about this. Who do you think you are?”