I found a very confusing thing today: When I look at messages in the GMail app on my Android phone, the picture I set for the login on my Macbook at work is my icon in the message thread. I never did anything to integrate GMail with my OS, never requested that the image be shared anywhere, and can't find a way to delete it.
This leads to two questions:
1) How do I ensure that my laptop login picture is not associated with anything, anywhere, ever?
2) Where would I go to submit feedback to Apple in order to tell them "never, ever do things like this"?