There's all sorts of legal issues. It's a minefield. And in any case, there's huge PR exposure. And Google is ridiculously sensitive to bad PR. I often get th

There's all sorts of legal issues. It's a minefield. And in any case, there's huge PR exposure. And Google is ridiculously sensitive to bad PR. I often get the sense the lawyers are running things, considering how often I've given up personally on ideas that involve data mining.