Is it all Libertarians that are as childish as the caller just now who whined "I wanna drive my jeep!"?
I mean, seriously. Is that a grown-up talking? Sure, everyone wants the right to do anything, but only Libertarians seem to think that it's o.k. to destroy our children's future just so that people TODAY can party.
I have found ONE responsible Libertarian: David Brin. And Thom, you might find him a good guest; he really is a rocket scientist and many of your listeners would have enjoyed his science fiction. Libertarians should think about his address to their national convention in 2002: http://www.davidbrin.com/libertarian1.htm