some indeed do, with differing degrees of success (and differing degrees of opting out). The state often (not always) pursues them for taxes on services they did not use. The speculation as to why the state reacts that way is that more and more people might begin to rationalize how their taxes are spent, and would want to at least get more control over what they are spent on, to encourage public spending they deem wise and discourage that of which they disapprove. This would remove alot of state decision making power (and probably several layers of state bureaucracy also)
It would also be more democratic, which I heard was the name of the game we are (supposedly) playing.
Like it or not, alot or people take seriously how their money is spent in the name of the public good, and strongly dislike not being able to prevent spending on areas that have consistent 100% bipartisan approval (e.g. war or corporate tax breaks). These people are attracted to Bitcoin, as it seem like a way to exert the control they seek.
Satoshi (and the other cypherpunks) absolutely knew that this would be one of the most disruptive aspects of decentralized money: it was a design goal. I hope everyone's prepared for the full implications of this, regardless of their own perspective.