Number one mistake actors commonly make.
From a viewer's point of view, the number one mistake TV and film actors make is; when filming a scene where one actor is supposed to be driving and talking to another actor in the car, they take their eyes off the road for too long and pay attention to the conversation, not the driving. Not realistic. In real life they would crash most of the time.
Add that to the doors always being unlocked and you have a sloppy scene.