Facebook is like a drunk college student who shows up at a party uninvited and when caught rifling the medicine cabinet belches his contempt for you. This article at ZDNet indicates that they have alienated many more users of their service but not quite their customers, (not to be confused with the users). Facebook is walking public relations disaster because it it run by a crew of unscrupulous people. The accidental merging of the data should be a wake up call for all those companies using hadoop, no sql and so called big table approaches. While this kind of error is possible with SQL databases, it is not as likely to happen.