Details of 100m Facebook users collected and published
Found on BBC News on Tuesday, 27 July 2010

Ron Bowles used a piece of code to scan Facebook profiles, collecting data not hidden by the user's privacy settings.
Mr Bowles said he published the data to highlight privacy issues, but Facebook said it was already public information.
Earlier this year there was a storm of protest from users of the site over the complexity of Facebook's privacy settings. As a result, the site rolled out simplified privacy controls.
Well, it is public data; but all information entered should be considered private by default unless the user decides to make it public.