ZDNet reports that over 1,000 Facebook users adopted a Photo of the Day application featuring National Geographic images that also embedded malicious code, creating a botnet of users that launched distributed denial of service attacks. The good news is that information security researchers orchestrated the “Facebot” in order to expose this security flaw. The bad news is that given the flaws in social network platforms, real attacks could be worse. (Here is the research paper that the group produced, which is entitled “Antisocial Networks: Turning a Social Network into a Botnet”). Although Facebook has fixed the vulnerability identified by the researchers, concerns remain about the security risks of third-party applications on social networking sites. The serious downside of a pretty picture, to be sure.