I think common sense dictates that we have a look to see if opening our car door will obstruct any traffic - Pedestrian, car, bike or other. At the very least we don't want our door damaged by a passing car. But the person at the highest risk is the cyclist. A passing vehicle can take your door off and a passing pedestrian could sustain a nasty bump. But a bicycle Slamming into an open door at 25k would not be a subtle interaction. This is more prevalent than I realized. In Toronto, for example "motorist opens door in path of cyclist" collisions were 11.9% of all reported car/bike collisions in 2003. And that was 10 years ago.
What it boils down to is creating an awareness. Our current system of Implementing a dangerous situation and not telling anyone, doesn't seem to be working. For example, don't put bike lanes in the path of potential open doors without letting everyone know there's a hazard. Or perhaps we should be following suit with cities like Chicago. The current government is proposing a $1,000 fine for dooring a cyclist (in Toronto it's currently $85). As well as placing stickers on the rear passenger windows of every cab in the city, saying “Look! Before Opening Your Door." These are good ideas as long as we're careful the increase in fines is not used as a revenue generator for the city.
In the new world, bike lanes will be wide enough to include any potential hazards that may be encountered in said bike lane.
AND SO IT SHALL BE WRITTEN!