I was serious, excluding the Unibomber reference. Isolating yourself and living off the land is the closest you're going to get.

You won't be consuming any of our tax-funded services, and you won't be contributing to our economy or paying taxes (assuming no property tax?)

Beyond that, the people inside these borders have decided this is how we want things to work, and (as I mentioned) if you don't like it you're free to give up your citizenship and move somewhere else.

Actually you're not. The US won't let you go stateless and even makes it complicated to renounce your US citizenship after you've gotten a second one. Usually it takes many years to be eligible for citizenship elsewhere.

Not that I think it's terribly relevant...

There are millions of people living in the US today that have no legal right to be here. You can live like they do off the "grid" but you will make less money and have less security.