By default, a user's My Site is private. This means that each person's list of followers and who that person is following ...

By default, a user's My Site is private. This means that each person's list of followers and who that person is following is not shared with anyone. Additionally, all activities (including new follow notifications, social tagging and rating of content, birthdays, job title changes, workplace anniversary, updating ask me about, posting on a note board, and new blog posts) will be private. Choosing this option will enable all of these activities by default for all users and override whatever policies are set within People and Privacy in the Manage Policies page.