Post a boarding pass on Facebook, get your account stolen
And this is also why I almost never give my real birth date when registering on websites (except on financial websites or websites where I'm legally obligated to) and I never ever give real answers to the security question..My typical answer for a security question is something like "39arsrc uyrsrsaulsr8832r" and that's saved in a password managerSecurity questions weakens the security of an account, they are easily found information that people can just guess.