Privacy advocates have held Facebook's feet to the fire on several occasions over various privacy issues that have crept up since its inception, and if Google's to truly become a Facebook killer, the sultan of search would be wise not to follow in Zuckerberg's footsteps. It's interesting, then, that Google has decided to ban private Google+ profiles, requiring users to make their profiles public or face account deletion.
"The purpose of Google Profiles is to enable you to manage your online identity. Today, nearly all Google Profiles are public. We believe that using Google Profiles to help people find and connect with you online is how the product is best used. Private profiles don’t allow this, so we have decided to require all profiles to be public," Google states in a Google+ help article.
Google points out that your full name and gender are the only required information that will be displayed on your profile and you're free to edit or remove any other information you want to keep private.
Google+ users have until July 31, 2011 to make their profiles public or voluntarily delete them. After that date, "all private profiles will be deleted" for you.