The bottom right of that flowchart is a little scary. So anything you post, no matter how private you want it to be, can be seen by anyone that it gets re-shared to?
Nevermind: just noticed that that only applies to posts you share publically.
wrong.. if you mark it as a limited share...no one outside that circle can share it..try it yourself and see...it is a new change that went into effect over the weekend
That's a good change, but that's not my point. My point is that things don't automatically become unprivate because there's a share button. Somebody has to make the decision to share these things, and they still have the ability to do so without a convenient button. The point is that users should still maintain good sense about what they post.
Also if you send something to one circle and then add someone to that circle later, they get to see everything sent to that circle.