I'm all in favour of opting out of taxes -- provided that one simultaneously opts out of using public roads and utilities; opts out of being protected by public

I'm all in favour of opting out of taxes -- provided that one simultaneously opts out of using public roads and utilities; opts out of being protected by public police, fire, and emergency services; opts out of using public legal regimes for the enforcement of contracts and property rights; and opts out of being able buy goods or receive services from people who have been received public educations. If you're happy to live without any of those things, then fine -- don't pay taxes.