Led by Facebook director of product Blake Ross, a gang of engineers from various social media companies hacked a browser plug-in that adds social search features to Google without the Google+ “bias” the search engine introduced with its “Search Plus Your World.” initiative. It’s mighty cheeky of Facebook to try look innocent in this debate, to say the least. But it’s also legitimate to question whether Google’s social search signals and its Google profiles somehow break the promise of independent search results. While this looks like schoolyard squabbling in public, the stakes are potentially high. Last week, I proposed that the conflicted parties license data to each other, perhaps through a third-party clearinghouse.