I live without auto complete, voice search or saved passwords. No history on google, Nothing signed in on Android. My info is still all over the place and associated to my IP (which despite not being static, never actually changes). It's not that I have anything to hide but when your details, words, location, habits, spending patterns and personal associations, can be searched, edited and manipulated to paint any picture, it's not a good place to be. Imagine an automated system flagging you because you act suspiciously (using encryption!) and deciding that because of A, B and C you are now on the 'list'. We've overtook Orwellian nightmares a long time ago.
Want to protest, get in to politics, speak out against injustice? Sorry you looked at porn once, your word and your reputation are shit!
Extreme I know but have you read
these?