Wow, for anyone interested in online security this is a cracking read
Hacker vs. Hacker - BusinessWeek
If you can't be bothered, long story short, a specialist online security firm that advised corporations and govt depts made the biggest sin of all...
They used the same username and password across multiple systems, eg email, social media accounts.....
Perish the thought of anyone stupid enough to do that!!!!
<sprints off and resets all of his passwords!>