[calloc]

I post very little in public, I try to keep it to a minimum, I don't think it is fair to dominate a single persons stream. If and when I do want to publicly post something I do so knowing that everyone gets to see it, including those in my tech circles.

I just get more selective of what posts I do that with. Generally I try to keep it short, or just a link to a blog post so that it is easier to skim over it and realise that it is not of interest.

Google+'s feature of allowing people to mute a post is absolutely fantastic as well, and allows people to control whether or not their stream gets my content that is actively being commented on.

Would I love a feature that would allow me to post publicly but not include certain circles (or rather, not force it into their stream), absolutely. Have some way of doing soft suggestions when posting publicly, as in, this circle may be interested in it, and those following me may be interested in it, but my family isn't interested in it so don't push it to their stream.