I agree. You can refuse the whole state because of moral reasons. But I do not think it is very effective to spread libertarian ideas through morals. Most people defend the state because it is simply dogma that the state is good. If you tell someone that what state does is, in principle, the same what mafia does... Well, the discussion basically ended (at least on the rational level). So that is why here on @laissez-faire we are trying to explain these topics from an economical and practical (at least in some cases :D) point of view.