I guess the problem is that you added a bunch of strangers to Google+. That's not what Google+ is for.
Um... Isn't that the reason "circles" in Google+ exist? To draw lines?
It's why we read HN instead of Reddit or Slashdot: mostly to be different.
I don't think anyone only "reads" one community. According to interest, one participates in many?
Personally, I found all this quite confusing (and just when I figured how to "circle"; doh, limit has been reached for adding people. But, you can start adding tomorrow!)... and following the advice of sp332 and betterth, I avoided falling into blunders like Google adding all 1000+ contacts to my Gtalk or notifying each and everything that ever happens in G+ universe.
Moreover, since now people are split inside circles, am I supposed to update the circle manually everyday?