There is no HUGE difference if my failing to participate does not cause another harm is there? The ONLY difference then would be a group of people calling themselves government wouldn't get to own my behavior or unjustly punish me for believing I own myself.
Laws are not inherently just or moral and quite often are flat out wrong. For instance slavery was once legal, but I would never have told a slave, "just be a good slave and some day this will be illegal and you can be free" or "hey slave work on changing the law" .
Simply offering "it's the law" as a justification for a stupid law is a circular argument. Obviously murder and harming people should have consequences. Should there be consequences to people that break stupid laws, but harm nobody?
Do you follow all stupid laws? That would be endorsing stupid behavior wouldn't it?
I'm not saying that all laws are just, and there are a number of laws I don't agree with. Regardless of whether I agree with them or not, I realize that if I break those laws I am subject to punishment for my "crimes".
I guess it depends on your definition of "harm". NoDrama just gave a pretty good example of what happens when there is very little or no regulatory control over a particular group of individuals. (BTW NoDrama, they "sat on their hands and did nothing" over at the SEC because there has been an increasing number of DEregulatory measures imposed upon the financial sector over the past decade or two. They WERE doing their job by NOT regulating certain areas, because that's what they were told to do). I say you are causing harm to everyone when you don't "participate" in the nonvoluntary action of paying taxes.
By not paying taxes, you are ADDING to the financial burdens of everyone who does. If there isn't enough tax revenue coming in to pay for the things we use, what happens? Other people have to pay more, don't they? Who do you think pays more in taxes, businesses or individuals? If you guessed businesses, you're right. What happens when extra taxes are imposed on businesses? If you said, small businesses suffer the most and lots of people lose their jobs, you're right again! What happens when lots of people are unemployed? Demand for government services goes UP. If people aren't paying taxes, where does the money come from to pay for these services? What's that? You say you want to get rid of these services? And there's no HARM in that?
Do you see where I'm going with this?
We seem to have a fundamental disagreement between us over the concept of "liberty". "Every man for himself" is not a system of government, it's a declaration of a desire for non-government. You seem to think you'd have more "liberty" if there were no government, but I think there's empirical evidence to suggest otherwise. Without our government, there is no "liberty". Not for you, not for me, not for any of us. There was a time, not so long ago, when wars were fought on American soil. Do you remember what they were fighting for? Independence, right? Do you really want to go back to the days when every militarized nation with enough strength was camped out on what is now US soil hoping to claim America for themselves?