This article made me think about the relationship between metadata and data. The dangerous thing about metadata is that if you have enough it, you can derive a

This article made me think about the relationship between metadata and data. The dangerous thing about metadata is that if you have enough it, you can derive a whole lot more than one would expect. Maybe the same thing goes for surveillance in public areas... Given enough of it, does that start to show you what's happening in private? (Imagine for a second that people are packets, and public areas are the network) At what point does that become unacceptable?