I'm not being upset, I'm disagreeing.
An open door is an open door and a driver not paying good attention might hit
Well, an open door when a car is facing you often has reflectors and is usually an obvious colour (both for safety). When the car is facing away, it's often a dark colour and (in daytime) looks like the side of a car. The difference could be slightly confusing to somebody, enough to eat up a second or two of valuable time.
What I'm basically saying is that the safety features built into car doors to prevent this situation don't work when you're pointing backwards, so it's an extra risk.
In America, we need to know who to blame and how many significant figures can be obtained before anything else!
Thank you, that's the answer I was looking for!