BusinessInsider.com: Facebook founder and CEO "Broke Into A Facebook User's Private Email Account" over newspaper story

Mark Zuckerberg was not content to wait until the morning to find out if the Crimson would include John's accusations in its story.

Instead, he decided to access the email accounts of Crimson editors and review their emails. How did he do this? Here's how Mark described his hack to a friend:

Mark used his site, TheFacebook.com, to look up members of the site who identified themselves as members of the Crimson. Then he examined a log of failed logins to see if any of the Crimson members had ever entered an incorrect password into TheFacebook.com. If the cases in which they had entered failed logins, Mark tried to use them to access the Crimson members' Harvard email accounts. He successfully accessed two of them.

In other words, Mark appears to have used private login data from TheFacebook to hack into the separate email accounts of some TheFacebook users.