Ever heard of Echelon?
THe US Govt ahs refuse dto admit or deny its existance, but alot of docs have come out. A large number cna be found on the highly respected
http://www.cryptome.org
.
It is basicly a network of computers, very, verypower that can analyise in realtime phone conversations and other data transfer (such at the net) for words or phrases. For instance, if you make a hpoen call that is watched, and i say for instance, bomb nad president, the call will eb tagged, recorded and sent thoguh to an operater to analyse.
As well as mass monitering of web content.
Big Brother is watching.
I'm no con sipricy theorist but echelon iswell known, there is mainstrema media stuff abotu it.