Google Maps Navigation - read before use!

If you plan a trip today, you normally pack your bags, hop into your car, program your GPS navigation and get going. When using Google Maps Navigation however, you better read the whole result before you get going: while other navigation systems normally feature suggestions for ships & ferries to cross waters that block the way to the destination, google takes another path and recommends - to swim. If you plan for example to go from let's say London to New York, you will find at stage 37 of your way Goolge maps suggests you to "Swim accross the Atlantic Ocean". I cannot confirm if the place where they send you swimming is a good place to do so, if there is a car park around, and I dont know if the place where you reach the US shore enables you at all to get on land, if you ever get that far. But it surely puts a point to the fact that navigation systems have an inherent danger: people tend to follow directions without thinking where the street goes. Ignoring completely their own brain that knows that a path is wrong, they blindly follow the instructions into lakes and dead ends. Or they simply crash their vehicle because the program the route while driving. I still remember a BMW representative saying in a newspaper article I read, in which a man drove his car into a lake mistaking the pier for a bridge because it was indicated as such in the navigation system, "A navigation system is not a night vision system. You will still have to look out of the window instead of the screen".