Average Joes are not going to have to track all there btc spending. IRS has no way of tying you to a anonymous bitcoin address. Nor do they want to waste time on it. Pull your head out of your ass.
Shhhh.
I prefer it if others offer themselves as sacrifices, it sates the beasts hunger and so lessens the chance of it hunting me.
Don't worry, you will pay tax anyway in the form of purchase tax. hmmm tax!