While I am not sure if all the claims made in "Google deserves your nomination for Big Brother of the Year", are true, but Google's popularity is a concern like a volcano growing in your backyard.  I mean wouldn't it be really stupid for NSA, FBI, and CIA, if they didn't ask Google for co-operation?  What can Google management say?  Sorry, we can't notify authorities when someone googles 'How to destroy America in 21days' because we think profit is more important than national security?  If those government agencies are doing their job properly, then Google will be in compromising position soon or later, if not already.