I personally live in a NON legal area.
So as Big Brother really can and could watch everything and I'm to pretty for the big house I use TOR: The Onion Router ( Tor: anonymity online )
Once you set it up you can be very hard to track. It will slow down your connection as right now I appear to be posting from Europe and am on East Coast. I will and does affect Google searches so I just use Dogpile Web Search myself.
So far no troubles.
I do know the LEO's use this for trying to track molesters and it makes them almost impossible to track.
Of course the rich boy option is to buy an off the shelf laptop and only post from web cafes AND never ever put personal info on that.
Good luck and be Safe,
Buz