> Lenders have begun mining Facebook and similar graphs, and turning down credit for people whose graph ("friends") includes people who are deemed risky.
A different news item, upon which I based my comment, said IIRC that they were using friends credit worthiness as a metric. Call my cynical, but I find it hard to believe they won't, sooner or later and as such data aggregates throughout commercial databases and so beyond the requirement to request reporting from (in the U.S.) the "big three" credit reporting agencies.
I don't have that item at hand, but here are a couple of more that Google turned up (quick search and scan). The link above and the first below both seem to be based on the final, third link.
Source(s)?