Unless you are a world class hacker there is no way to be anonymous. Yes you can make it a little more difficult but if you are actually a part of anything serious they will get you.....Unless as I said ur a world class hacker.
So basically you have to either just live in a way where your activity is not compromising you or become a world class hacker.

In truth I find energetic consciousness to be able to solve all problems, that even of which technology cannot solve~*~