IMO those who believe taxes are theft have a duty to bring the offender - the thief - to justice. Each one of you who so believes needs to stop paying taxes. I suggest they singularly or in mass go to a big box store and put that $2,000 big screen on a cart, give the cashier the exact amount of money at which the TV was advertised and leave.
Doing so would make them a real member of the Tea Party, and then do as one of the first Libertarians - Henry David Thoreau - suggests in On the Duty of Civil Disobedience, go to jail on principle.
Postscript: Actually Libertarians have another choice. Leave the United States which you seem so displeased with and go to a nation wherein you can live free and unencumbered. I'm sure there is a nation where no taxes are stolen from the population, there is no gun control, public schools or other trappings of American Society.
Somalia comes to mind.
Using that logic, anybody being robbed at gunpoint has a duty to refuse the thief and be killed instead.
Your call. But I see little point in responding to any criticism of libertarianism that includes a reference to Somalia. It's about as meaningful as screeds against Obama claiming he is a socialist.