There are some major changes brewing behind the doors at Facebook, wherein the designers have planned to mesh together all the various forms of internet-based communication in order to solidify the trend of "all-in-one-social-network-computing". One main portion is there will be new Facebook email accounts. You may wish to read the pros and cons of such a move, because it will affect you or someone you know, and it's best to be aware of both the threats and the benefits before it becomes widely implemented.
Unfortunately, there is a general misunderstanding of the proper use of privacy settings and overall social-network security. Even if you have your account locked down with privacy settings you feel safe with, those in your networks often do not, and these people have access to your page.
To read more detail about the upcoming changes, please check out the article written at Sophos below.