I'm not sure why Google is getting a free pass on the public profiles requirement. Every other social network I've used has an option to block search engines from indexing your profile.
I think they unambiguously want to be indexing everyone's whole social graph. Facebook and others certainly do it anyways, but under the pretense that some people are to remain hidden and others are not...
"If you currently have a private profile but you do not wish to make your profile public, you can delete your profile. Or, you can simply do nothing. All private profiles will be deleted after July 31, 2011."
That only stops Google+ internal search from returning your profile given your name. Your page is still public (and linked to by, for example, your friends' pages) so any search engine can index it.
