What if I don't report it?
Face to face trades.
Of course, not paying your share into a system that you benefit from makes you a freeloader (or at the very least a leech).
I'm paying my share to the system I benefitted from, BTC that is. I didn't benefit from USD.
/devilsadvocate
You did not ask me, but I feel compelled to answer.
Roads: Irreverent. Fuel Tax, local extortion taxes pay for these things.
Electric Grid: Irreverent. Electric grid is payed for and maintained by people who buy electricity.
US army: NO. The military in it's current state is currently creating a tangible threat to the US through current actions around the globe that protect corporate interests, not those of US citizens.
Social Security: NO. Is payed for through your voluntary contribution into the SS system. I have never paid a dime into it therefor I am not eligible.