I think our grouping of friends is generally suppressed in our thinking. We have fine-grained distinctions among our friends, but we generally don't see it that way because they're not important re <i>friendship</i>.<p>Instead, we have different conversations with different friends. While this is normally private, that's only because of how we're interacting--in person, over chat, etc.--and not because of any desire to keep it secret. A social media site has analogs to a more general meet-up or party in that our conversations are often <i>on the side</i>: we're not talking to everyone but we don't mind people listening in.<p>The article's critique wouldn't have much intuitive appeal if it was possible to create "open" circles where conversations wouldn't appear in public, but a user who wished to see them could listen in and possibly comment, signaling their interest in joining that group.