I think we need to start looking at the meta-data generated by communication networks (who talks/chats/tweets/etc whom, and when) as a commons, that needs to be regulated. Beyond the European privacy laws designed to protect privacy, I think there should probably be limits on who is allowed to do what, and how one is allowed to store and profit from the knowledge. It should be a regulated privilege to be able to handle this information, in a similar way that it's a privilege to run passenger trains, or even postal and phone services.