Don't get too paranoid just yet, hubi. What you're seeing on Google is definitely not real-time. From their FAQ: "Google Earth acquires the best imagery available, most of which is approximately one to three years old." (And you can be sure they make "sensitive" images, such as military installations, unavailable.)

Personally, I'm more concerned about the proliferation of digital cameras, and the relative cheapness of storage media. There was a story on Slashdot a while back about how the British (who already have cameras everywhere to monitor their citizens' public behavior) are deploying a system of cameras along highways that will read peoples' license plates as they drive, ostensibly to deter speeding.