Use the off button - complain to his sponsors or whoever syndicates him, but don't let the government do this for you: if the government can do this for you, it will eventually do it *to* you Actually people did complain. And since Howard is on public airwaves, the most logical place to complain is to the FCC.
This is just my opinion, but I really don't see Howard Stern as supermartyr for the cause of free speech.
I don't care for his show, either - so I don't listen to it, but I used to occasionally. It's the same crap it has always been. He is a good case for princilpled conservatism: do you allow the government to make moral decisions for you, or do you make your own decisons? If you are capable of making your own decisions, you do not need the government to do this. As I said, the free market is perfectly capable of handling the Howard Sterns of the world.
This is just my opinion, but I really don't see Howard Stern as supermartyr for the cause of free speech.