Most people don't create a lot of content, and won't bother tagging their short tweet/status This is a good point, but couldn't that also be said for the exist

Most people don't create a lot of content, and won't bother tagging their short tweet/status This is a good point, but couldn't that also be said for the existing way Circles work? I think some form of the reverse would be better for power users without affecting the casual users.