Well, let us take a look at some of the folk who often sail under the libertarian flag:
* anarcho-capitalism (Hell-O Murray Rothbard!)
* minarchism
* market anarchism
* libertarian anarchism
* propertarian anarchism
MB's point that libertarianism is not antithetical to (or is at least accommodating of) anarchism is spot-on. In that sense, I agree, given the evidence.
I've already conceded several times that there are indeed libertarian anarchists. My point, which you seem determined to miss if at all possible, is that they are the MINORITY, and that their philosophy is not shared with the majority of libertarians, and that just because there are some anarchist libertarians doesn't mean that libertarianism = anarchism. Is that really so hard to comprehend?
I also never stated that their viewpoints were antithetical to libertarianism. Only that it was an extreme application of it.