Well given updates in technology, this is a pretty much impossible task unless you go completely off the grid. Any time you log on to a computer, use a mobile phone or access any form of electronic technology, it is likely that the state - if it wanted - could track you and use social engineering-style tactics to associate you with your politics.
So unless you want to go 'off grid' in some sort of guerilla warfare style - which I would say is not advisable today - then you will struggle with this tactic of 'secrecy'.


