I would like to disable showing me on other users' profiles in sidebar in circles.
I am pretty sure there was such option in settings, but I can't find it now. To support my thought i've checked my own circles.
On my own circles page ( https://plus.google.com/u/0/circles ) there is "My Circles (194)" On my profile ( https://plus.google.com/u/0/106157307077731636106/posts ) there is "In your circles: 166".
So I guess 28 people in my circles decided not be shown on other people's profiles.