Libertarianism = Anarchy?

Libertarians often say they aren't anarchists, they just believe in really small government.  However in order to join the Libertarian Party you must certify that you are against the initiation of force.  Anarchy is described as the lack of a hierarchal authority, no one has any power over anyone else (ideally).  Taken to its logical conclusion, a libertarian government obviously could not do anything without absolute consent of each and every individual.  It could not even levy any taxes, because taxes by their very definition are an initiation of force.  If people give willingly it's called donations.  Government itself is all about force and control.  It makes people do things that might not be good for them, but good for the group as a whole which libertarians find abhorrent.  How can a party that requires such a pledge morally participate in governmental elections unless their only platform was to immediately dissolve the government once elected?  Which ironically would require a significant power grab for them to even do so.  Why can't libertarians just fess up and admit they're anarchists?

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But we enforce the rights of other people to drink and drive their  cars. My friend was nearly killed by a drunk driver.

Protect her right to live?

Although I agree with Libertarians on many points, I'm really sick of the whole idea that gun control and legalizing all drugs is a capital idea.

The idiots of the world who abuse Guns and Drugs can fuck their lives and the lives of dozens of other people through their actions. If a husband gets addicted to crack and sells all his possessions so he can buy more, where is the safety net for his children and family?

Libertarians don't believe in welfare or Social Security, so basically, those Children are fucked. Because we want to protect  the husbands "right" to fuck his kids over.