lol... I am pretty sure you can use common sense dont turn into the door. xD. The Google Navigation feature has only failed me once and its usually down gated private roads in remote areas other then that its pretty darn accurate specially if you have the GPS function on your phone turned on.
You would be surprised how dim-witted people can really be, especially when being guided by a GPS. Even in a car, people have ended up in lakes and crashing through gated areas because they didn't want to second-guess the electronic lady telling them to turn.