I thought this one was a particular beauty, especially in conjunction with the info surrounding it:
We may use the name that you provide for your Google Profile across all of the services we offer that require a Google Account. In addition, we may replace past names associated with your Google Account, so that you are represented consistently across all our services. If other users already have your email or other information that identifies you, we may show them your publicly visible Google Profile information, such as your name and photo.