Such issues have dogged Facebook for quite some time now, over what some see as a cavalier attitude towards privacy. While generally privacy experts have praised Google+ for its work in keeping your data under lock and key if you want it to, the site is certainly not perfect.

One issue surrounds the procedure for blocking individuals. When a user blocks a person, in some circumstances the site fails to remove that person from the blocker's circles. Thus, posts will still appear in that user's front page feed. Additionally, the blocked person would still be able to see posts on Google+ made before he or she was blocked.

Also for a time, users were able to share posts from contacts who have posted something to a limited circle. Google has since corrected this, and the only shareable posts from another user are those marked "public." Obviously, if left uncorrected at launch, this could have been a serious problem for the service.