I believe the main issue is that people use facebook as if it were the open web. People aren't posting because they want to keep their content in a silo, but ra

I believe the main issue is that people use facebook as if it were the open web. People aren't posting because they want to keep their content in a silo, but rather because they don't know of / have an alternative publishing vector. Nobody is saying don't have private silos, but I believe Gruber and co are saying don't pretend like a private silo is public, when it isn't.