You see, a pure libertarian utopia cannot work in a fallen world because, as I'm sure you've noticed, people suck. However, this is not an excuse to create a government that regulates every aspect of life. Men are endowed with certain God-given inalienable rights, and the position of the libertarian to me, is that government exists soley to protect the inalienable rights of the individual. Conservatives seem to be more interested in preserving a society at the exspense of personal freedom.
It all seems to really depend on where one draws his or her line.
Also, most of the libertarians I know are pro-life, and the statement that all libertarians are pro-choice is nothing but slander.