Google Earth as a Terror Tool

Our governments are always telling us that we need to be on the lookout for terrorists, and if we see anything suspicious, here in Australia at least, we have a national security phone number we should call to pass that information along.

Alert but not Alarmed. Thats what they say anyway.

Now to the subject at hand. Google Earth would be a fantastic tool for terrorists to use in the planning stages of a terror attack. With this program routes can be determined and measured. Even firing lines could be worked out.

My point is, why are we on the lookout for these terrorists when chances are most of the research is being done online.