I have nothing that I need to hide.
Just like all the people throughout history who were horribly abused or massacred by corrupt governments had 'nothing to hide.' Even if you believe that you've done nothing insidious, those in power may have a different opinion of you. What you fail to realize is that governments aren't made up of perfect beings; they can, have, and will harm you if they so feel like it. History provides ample evidence of this, and so I think you have plenty to hide, but that doesn't mean you've done anything wrong.
And since I believe privacy is a basic human desire, I'll have to reject your other ideas.