The creeps a lot of people out. What creeps them out even more is that you can’t opt out.
Of course there is always my way out… (cue lightning flash and creepy James Earl Jone laugh).
Seriously though, don’t use Google services exclusively. Use Bing instead of Google for searching. Use Yahoo instead of GMail. Buy an iPhone, or if you want an Android phone, create a new email account just for phone use. Use Facebook instead of Google+.
If you give one company all your data what do you think they are going to do with it?
You ultimately have control over this in your choice of providers. You can opt out by switching.