tekgoblin writes "Google plans to use data from its +1 button to re-order search results and keep spammers at bay. While this would bring Google’s search engine into the social networking era, it would also create a new avenue for blackhats to manipulate search results. From the article: '"Google will study the clicks on +1 buttons as a signal that influences the ranking and appearance of websites in search results," a spokesman wrote. "The purpose of any ranking signal is to improve overall search quality. For +1's and other social ranking signals, as with any new ranking signal, we'll be starting carefully and learning how those signals are related to quality."'"