Can Facebook Friends Sink Your Credit Score?

According to this BetaBeat article, banks are slowly-but-surely adopting the Facebook philosophy (i.e. "privacy is dead") by increasingly looking into social networking sites as a means to determine creditworthiness. The assumption that "birds of a feather flock together" translates into people who are financially responsible will know others who are as well-- which means that banks would be willing to deal with those customers. What about friends or family members running into financial trouble or notorious for overdrafting? It turns out that they could negatively impact the way banks view you. One bank already determines your credit standing via social networking sites and it will share information, such as being late on a payment, with your family and friends. Meep! Since this technology is quoted about being three-to-five years away, will that determine who you decide to socially acknowledge online?