Quite on the contrary, i am an anarchist myself, and i believe, that if an adult person wants to harm himself, he has every right, constitutional even, to do so. Nobody, and especially not the government, has the right to tell you what you can or can't put in your own body, after all, you OWN your own body, and should have the right to do whatever you'd like with it.
Same goes for prostitution, provided it's not a form of human slavery, everyone should have a right to sell their body for money, however, they should also have the right and chance for a normal job, which would be enough for a living, so that they're not forced into prostitution just because they can't feed themselves.
Also, anarchism isn't a state without law or human rights. Such a state would be anomie. Maybe you should do a little reading on anarchism before you dismiss it so quickly.
And then again, there is the fact that banning drugs doesn't do apsolutely anything in stopping them, it just promotes real crime and underground networking. I also have to add, that a significant part of scheduled drugs are completely safe and non-damaging, as well as non-addicting.
Liberty is, essentially, freedom.
By banning these things you take out the very meaning of it.
Under such circumstance your statement ''we believe in the rule of law and the preservation of the human rights of individual people'' seems quite funny, hypocritical even.