The fact that the images are a few years old isn't really a rebuttal, since government buildings don't tend to move all that often. I think there ought to be areas of the world - e.g. governmental and military installations - that Google Maps blocks out. The level of detail available in many inner city areas would be very useful, it has to be said, to potential terrorists. But we can't run the web presuming every, or perhaps indeed any, user to be a terrorist. That's just daft. Perhaps a sensible compromise in this case - along the lines of what I suggest? - would be a prudent step for Google.