This is really the same debate that's been going on since the Greeks, only now in a much more uninformed way. It reminds me of CNN's 1986 Crossfire show where the lyrics of a rock song was accused of promoting incest and Frank Zappa was invited as a representative musician. Zappa is not defending the Prince's "Incest is a good thing" statement in the lyrics in question, but he is defending the right of the artist to say it.
Some telling and relevant in context quotes from the exchange are:
Robert Novak: "Mr Zappa, let me see if I can get your position straight. Are you saying there is no filth, no pornography, no obscenity, that should not be permitted to be sold and distributed freely in this country in the form of music videos and rock videos? ... Is there no filth, no obscenity you consider qualified to be suppressed?"
John Lofton (of the Washington Times): "I agree with you that the first line of responsibility is the family [Zappa has not mentioned neither "responsibility" of "family"] to stop the kind of garbage we're talking about here today; but good grief, can't we call upon our government to help us in this fight, Frank? Are you an Anarchist, is it the government's role to do nothing in this? ... Incest in America didn't use to be this kind of problem, it has come about in the last 20 years or so [implicating "pop music"] ... You should get out more! ... Would you look in the camera and tell them that the trash you sing and write was when the Founding Fathers had in mind when they drafted the First Amendment?! ... to defend songs that glorify Satanism, and incest, and suicide?!"
Zappa: "Absolutely!"
Chorus: "You're an idiot, then!"
Tom Braden: "What would you suggest, Mr Lofton, as a means of censorship? ... What government censor is going to decide for you?"
Lefton, to Zappa: "What is the government's role, Mr Zappa?" ... ("national defence") ... "Well, I consider this national defence, pal! Our families are under attack from people like you"
Zappa: "The biggest threat today is not communism, it is moving America toward a fascist theocracy, and everything that's happened during the Reagan administration is steering us down that pipe."
Panel laughs, "oh really, Mr Zappa" etc etc
It is really an extremely interesting (not to say entertaining!) episode, and I recommend it if you haven't laready seen it. The full video is available here:
http://www.spike.com/video/zappa-on-crossfire/2658805