Two days back, Facebook Questions was launched, however, Facebook is blocking search engines by only showing Questions to logged-in users. Facebook said that "search engines cann't access questions and answers through our Questions product. "That may be something we consider for the future but have no current plans to allow it," to SEL….who reports a search query site:facebook.com/questions/ yielded only a few results on Google and none from the past 24 hours while Yahoo! and Bing produces zero results.
"It's odd that Facebook would want to ignore that traffic source entirely. Don't be surprised if this policy changes.