It is quite ironic that people here are all up to date with every social media trend du jour and talk of "social graphs" and link analysis of friending and twee

It is quite ironic that people here are all up to date with every social media trend du jour and talk of "social graphs" and link analysis of friending and tweets as if this whole field is somehow new and unexplored but never think for a moment that they are wandering through some very well-travelled territory. Traffic analysis is nothing new, they are very good at it, so even if the contents of the messages remain completely opaque it is still possible to get useful intel just by knowing who is talking to whom.