Nowhere do the ToS limit this to "public reviews." The ToS say that ads may display "your Profile name, Profile photo, and actions you take on Google or on third-party applications connected to your Google Account."
"Actions you take on Google" is incredibly broad, and could be construed to include your email activity, web searches, Google Checkout purchases, etc. This is what concerns me: I can't say for certain which of my actions may show up in ads. They claim that I can control these, but I can't find a way to disable them without making a Google+ account.
"Actions you take on Google" is incredibly broad, and could be construed to include your email activity, web searches, Google Checkout purchases, etc. This is what concerns me: I can't say for certain which of my actions may show up in ads. They claim that I can control these, but I can't find a way to disable them without making a Google+ account.
http://www.google.com/intl/en/policies/terms/update/