Google Maps Security Threat?

From time to time, I will read in the media how some organization or other claims Google Maps as a security threat because it claims that the high resolution photos permit monitoring of troop movements and so forth. I think this is untrue because when I look at the maps of areas I know, they are out of date - it appears by years, not days or weeks - since I fail to see more modern structures. Here is a photo taken today from Google Maps which shows a park on the western tip of Montreal Island. As you can see, the trees are in full foliage. At the moment, the trees are bare and there is still some snow on the ground. In fact, this map has not changed in the year I have been monitoring it.