“Capitalizing on personal data is a lucrative enterprise. Facebook is in the midst of planning for an initial public offering of its stock in May that could value the young company at more than $100 billion on the Nasdaq Stock Market.
Facebook requires apps to ask permission before accessing a user’s personal details. However, a user’s friends aren’t notified if information about them is used by a friend’s app. An examination of the apps’ activities also suggests that Facebook occasionally isn’t enforcing its own rules on data privacy.”