Facebook CEO Mark Zuckerberg had some of his social networking accounts hacked. Hackers found his password lying among the over 100 million credentials stolen from LinkedIn in 2012. Zuckerberg also failed to secure his Twitter, LinkedIn and LinkedIn accounts with two-step verification – which would probably prevented anyone unauthorised from accessing the accounts even if they had managed to steal his password. But more even that, it appears that Mark Zuckerbergs password was extraordinarily dumb: ‘What a dumb f**k.”]
Source: https://grahamcluley.com/video-mark-zuckerbergs-password-choices-dadada-dumb/