Mark Zuckerberg's fan page was hacked, scams permeate the news feed, and fake profiles abound. What's Facebook doing about it?

Objections over privacy, or the lack of it, have plagued Facebook for almost as long as it's been around, but only recently has the social network's security become a contentious issue.

Earlier this week, a hacker hijacked CEO Mark Zuckerberg's fan page, and updated his status with a message that started "Let the hacking begin." The social network also tripped up when, in an attempt to clamp down on fake accounts, it disabled the profiles of two women who shared the same name as Prince William's fiancée, Kate Middleton. (The profiles were later restored.) And hacked accounts continue to inject deceptive updates into the news feed like, "XXXX persons viewed my profile in 2010! ... You can check who viewed your profile here now [insert malicious link]." With incidents like these, some users are bound to ask how they safe they are on Facebook. More