Google recently announced that their ads are going Facebook style by including the image and name for your account as an endorsement on ads. This came as part of an update to their terms of service.
To opt out of this go to https://plus.google.com/settings/endorsements?hl=en.
You will need to make sure that the checkbox towards the bottom of that page remains unchecked.
I wonder how long until Google starts showing derived endorsements on ads. If you carry an Android device around they’ll be able to see what places your visit most frequently, which they might want to use as an implied endorsement. That could make Google Now a huge source of ad related data.