Are you trying to be sarcastic?
The NSA has been recording and storing citizen data for over 2 decades (actually more). Hell, look up your address on Google StreetView. The NSA is WAY ahead of Google in their data mashups. I know. I have held executive positions at 2 "big brother" data companies, and the NSA is 1,000,000 times more active in data mining and analytics.
I was talking about other ‘private’ individuals.
Most civilian stalkers lack the ability to store and maintain and analyze that the entities funded by our tax dollars have.