G-Men will find you through your computer

From worldnetdaily.com:

Patent 6,947,978, granted this week, describes a process based on latency, or time lag between computers exchanging data, of "numerous" known locations on the Internet to build a "network latency topology map" for all users. Identifying the physical location of an individual user, reports CNET News.com, could then be accomplished by measuring how long it takes to connect to an unknown computer from numerous known machines, and using the latency response to display location on a map.

The NSA filed this patent, mind you.

...also, that's not paranoia creeping up your spine. That's actual awareness.