I got an idea. When you get the email notification that someone has added you to Google+ the "add to circle" button currently is just a link away from the email and to Google+. Would it be possible, if the user is using Gmail, to just add them without navigating away from the page? Does that make sense?
The notification emails don't bother me. Rather, I'd actually like the utility they would seem to offer: the ability to add people to circles right away. Unfortunately, the fake-o 'add to circles' button is misleading. Ironically, I would prefer to be able to turn off the Google+ bar and notification marker.