I happen to be libertarian. Although, I guess I don't really "frequent" this forum so much as I "occasion" it.
Although anarchy is a form of libertarianism to some people, it is not the unique form. In fact I argue that the only point of government is to regulate those areas which won't regulate themselves. Discrimination is such an example.
With regards to drug use, prostitution and some other issues: there is some harm caused by actions which generally only affect the individuals involved only in cases taken to the extreme. It has widely been shown that classical criminalization of these activities exacerbates the negative aspects while contemporary socialization, education and outreach is far more effective in the prevention of real harm.
So, in fact, you see me advocating for less legislation of personal lives and more education about proper living. Not really anarchy.