Ilya Somin has some further thoughts on Brink Lindsey's proposal. In fact he repeats an argument that I've made in the past:

Most of those who argue against a libertarian-conservative coalition focus heavily on the issue of civil libeties. It is indeed the case that even most pro-limited government conservatives differ with libertarians on social issues such as censorship of pornography and gay rights. These differences are not going to go away. As a matter of philosophical principle, these differences are very grave. However, they matter less as a matter of practical politics because the ability of government to seriously constrain these kinds of freedoms in the modern world is quite limited. All the efforts of social conservatives over the last forty years have had little impact on people's ability to consume pornography, nor have they significantly slowed what I think is the natural and inevitable evolution towards greater social and legal acceptance for homosexuals.