Google have indexed the Internet. They have indexed public roads (Street View). Both things are pretty useful. Pretty cool.
The issue now is they want to index people.. pretty creepy. This can be seen with Google+ and the various inflexible policies it has towards Google accounts. Is Google "person search" really that far off? Already you can email anyone with a Google account right(?) How long before you put in a name and a town and you get Google+, Facebook, Twitter profiles along with posts related to that user from their public names and confirmed alias.
The only way to opt out is to destroy your Google account which is a shame as gmail + docs are pretty awesome. I don't know how that would affect Android for the day to day user.