Ability to map e-mail addresses to profile names

When you sign up for a Google account and create a profile, we display the profile name in multiple places and generally allow it to be discovered by others who already know your e-mail address. This is explained in our Privacy Policy, which as of this writing, reads:

We may use the name 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.

In this spirit, we do not treat reports of locations that allow you to map e-mail addresses to profile names as a security vulnerability.