Circles are backwards for this, though. I shouldn't have to choose who I share my public posts with. Circles are great for posts I want to limit to a certain su

Circles are backwards for this, though. I shouldn't have to choose who I share my public posts with. Circles are great for posts I want to limit to a certain subset of people - e.g. semi-private conversations / photos about my friends that I'm not posting to Public. For posts where it's other people who want to do the limiting, I would like a way of categorizing my posts. A simple tag, or "public circle" would suffice. Let people subscribe to my "mountain biking" public circle (or tag), and I can post to that circle. Then people have the choice to either subscribe to everything I post or a subset based on their interests. I would use that feature a lot and would re-add a lot of the celebrity posters if they properly tagged their posts. But since they don't have a way to do that and I don't have a way to limit their posts based on a filter they get shoved into a circle of "following, but not really" that I rarely check.