Interesting article: http://cointelegraph.com/news/112262/florida-law-professor-names-cryptocurrencies-super-tax-havens.

I don't usually condone evading taxes in public forums but if you did want to take a stand against your government for using your tax dollars for fighting illegal wars based on disinformation, for arming rebels to fight against insubordinate regimes, for arming the Kurds to fight the previously armed rebels who turned out to be muslim extremists, for bailing out TBTF banks and failing industries, or for setting the stage for a major currency devaluation by going wild on the printing press, DRK looks like a great option. With RC4 it will be even more appealing.