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Some of the personal details that you might share on social networks, such as your high school, hometown, or birthday, are often the same items used in “secret” security questions for banks and Websites. An attacker who collects enough of this information may be able to access your most sensitive accounts.
via How to Stop 11 [...]

For Viral Crooks, Social Networks Are Prime Targets – NYTimes.com.
Malicious programs are rampaging through Web sites like Facebook and Twitter, spreading themselves by taking over people’s accounts and sending out messages to all of their friends and followers. The result is that people are inadvertently telling their co-workers and loved ones how to raise their [...]

Facebook Blocks Raunchy Worm – PC World.
Security firm AVG warned of the Facebook exploit that uses a suggestive female character to lure users into clicking on a URL, which will then post a link on their own Facebook wall, redirecting to the same page. AVG explains that in the past few days, some Facebook users [...]

http://www.pcworld.com/article/181973/facebook_invasion_beware_of_new_smart_worm.html

Hot on the heels of a reported hijacking of hundreds of Facebook groups, a new variation on an old worm is crawling its way into the social network’s walls. Attackers have released an updated, more intelligent version of the notorious Koobface virus, security analysts say–and anyone could become its next victim.
The worm typically works by [...]

Protect Your Privacy on Facebook and Twitter – PC World.
Here’s how to safeguard your identity and your personal data in the age of the social Web.
Tony Bradley, PC World
Sep 24, 2009 9:00 pm

Spyware Sneaks Past Facebook Safeguard – PC World.