Let's look at this a different way - you're 14, you're on the Internet. You start a hangout...to extended circles. Certain people join, and you get more "hanging out" than you had intended. And now questions are being asked. Did your parents consent to this? Where was the form that required parents to agree? Should there be restrictions on underage accounts? What kind of data should be public?
There's just a lot of legal issues, more than you'd expect. It requires a set of both design and engineering effort to get it just right. Google will get there. I hate to sound like a broken record but it's still in the feedback/reiteration stage (aka "field trial").