Here's the modified Terms of Service (from 6 months ago) amended for comparison with previous terms. Here's how to opt out of shit.
And here's what you agree to if'n you don't read the small print:
If you have a Google Account, we may display your Profile name, Profile photo, and actions you take on Google or on third-party applications connected to your Google Account (such as +1’s, reviews you write and comments you post) in our Services, including displaying in ads and other commercial contexts. We will respect the choices you make to limit sharing or visibility settings in your Google Account. For example, you can choose your settings so your name and photo do not appear in an ad.