I lived in Brooklyn for the better part of a decade, and was a gentrifier. I watched two neighborhoods change, and it seems to me the hard thing to talk about is that everything that's lost is immaterial. Destroying a neighborhood of folks who know each other can show larges gains on the balance sheet, but the losses can't be quantified.

Maybe Facebook can find a way to monetize those social relations, so the could be recognized as having a value. (/s)