How did this post get so popular? Google isn't doing any of this behind your back. If you don't want to share your identity with Google, don't use their services. Simple as that.

It is no secret that Google is a corporation. The only thing that matters to a corporation is to make money. Google doesn't spend millions on improving their search engine and developing a fantastic social networking service because of some altruistic motive. Don't be so naive as to expect companies like Google and Facebook to adhere to your idealistic views of privacy and anonymity if that means a reduction in profit.

Direct your energy to keeping the internet free. As long as we have that, we can represent ourselves however we like by being able to choose which services we use.