I think we adopt social conventions because they make for a more pleasant experience. I don't think we have a good sense of the social conventions that we should adopt in this online environment. People take their mobiles out to take pictures. They upload the pictures to a website or to Facebook. But other things may be in that picture, which you had no interest in, but they're still there. People who might not wish to be visible in the place where you took the picture. But we put this stuff up anyway. People run around and tag people that they recognize. There's this whole dynamic in which privacy is rapidly eroded unintentionally. The tempting to legislate good behavior is very, very difficult and probably not very effective. How do we evolve appropriate social conventions for the environment that we are not only living in but creating?