Originally Posted by
tomato coupe
Why would it?
They are approaching the vehicle, and could become involved with the actions the vehicle or driver has to take. I typically use rear view mirrors to stay aware of vehicles approaching from behind... this is especially important if I plan on changing lanes.
Granted ,there are countries that teach a form of "organic" driving, that excludes those behind you... but then they also tend to avoid using turn signals for lane changes too...