There has always been a tension within the conservative movement between libertarians and traditional (and now social) conservatives. Libertarians tend to be against government "interference" in personal affairs, while conservatives are willing to allow government intervention to protect societal values. This tension has been around since the early days of the modern conservative movement, and was played out initially with in the pages of "National Review". This tension continues today, as noted on the pages of Instapundit and Classical Values.
I think the problem is one of perception. I generally worry about the same things that social and traditional conservatives worry about. I do worry that our culture is degrading. While I self describe myself as a libertarian, I am also Catholic. I have one wife and view that as a permanent arrangement (one woman in my life is tough enough, why do some people want more?). Other than the glass of wine with dinner, I am not running around trying to score substances. I avoid most t.v. as it is a sewer.
But I believe that much of the cause is the increased role of government in our lives. Increasing government's role will exacerbate, not solve the problem. When people began to see government as the be all and end all, personal responsibility disappears. And if you try and regulate your way to virtue, you send up with hypocrisy and depravity.