If I’m not mistaken, Ron Paul is a constitutional conservative and a libertarian. They are not the same thing. The federal governments only interests should be to make sure they are excercising their enumerated powers as efficiently as possible. It is up to the individual states to determine for themselves whether or not they want to license marriage, or ban assisted suicide. If all libertarians wanted to flock to one state and do so then they should have that right as you would have the right to move there and politically fight them over it or stay away from it if you so choose.
Why do people argue for a federal ban on something like marijuana, but ignore the fact their is no federal laws on other immoral acts?