Google

Google has taken some heat for the lunch of it answer to social networking with Buzz. People are saying that Buzz invades privacy. Buzz was added to Gmail last week and when Gmail users signed up for this social networking tool they found themselves with a ready-made network of friends automatically selected by Google. This was based on the people each user communicated with through Gmail and chat services. A lot of critics viewed this as in invasion of privacy and they faulted Google for failing to ask permission before sharing a person's Buzz contacts with a broad audience.
http://www.nytimes.com/2010/02/13/technology/internet/13google.html