Google earth equals Terrorist tool

A terror expert in the Netherlands, from the Clingendael institute, thinks that the Dutch government should do something against tools like Google Earth on the internet. These tools would give would-be terrorists too easy access to vulnerable information like; the Dutch main port Rotterdam, government installations, houses of our royal family, etc, etc.
I remember a documentary on BBC Horizon on Al Qaeda which showed their methods of stacking out possible objects for attacks. It showed how somebody with a video camera, used by any tourist, made a video of the entrance of a subway used by a lot of Americans. It shows that you don’t need tools like Google Earth to get your information. You just go to the spot and look around. Nobody will ask you any questions, nobody will expect anything and the information is up-to-date. Something you can question if you use internet data.