As others have pointed out, Blizzard can't even block the gold farmers, and the government thinks it can find terrorists? Not to mention how many false leads they'll get from data mining. And do you honestly think that a real terrorist would be so foolish as to go into a program that logs everything and tie it to a real identity or even a known alias? There are just too many reasons why this is a waste of time for me to even get started.
As someone in the LJ WoW community said: "Great. Big Brother is now stealing my tier tokens."