1. As I wrote, cyclists can be outside the door zone and barely delay motorists in this corridor.
2. This is particularly true because it is so slow and congested.
3. When there is only one lane in each direction, cyclists should stay right when it is reasonable and safe for faster traffic to pass — but not so right as to be in the door zone.
4. Angry motorists do not injure bicyclists (except in the rare case when the cyclist responds aggressively, and then a fistfight may well break out, or worse).
5. Riding just a foot or two further right gives you a much (not slightly) greater risk of dooring — as opposed to an almost zero risk.
6. Dooring is serious. There is only one study of urban car-bike collisions that I know of, and it found: “Almost all cases [of dooring] occurred on arterial roads in central areas of the city, making the Door Prize, as it has become known, the most frequently reported type of bicycle/motor-vehicle collision in central Toronto. . . . Since the injuries sustained were often more severe than average, this type of crash would appear to be a very serious concern for urban cyclists.” (The study did not give a frequency distribution of crashes for central Toronto, but found that doorings were 12% of collisions citywide.) See http://www.toronto.ca/transportation/publications/bicycle_motor-vehicle/pdf/car-bike_collision_report.pdf
7. DZBLs reinforce and codify the misguided belief that it’s safer to be close to parked cars.

I would definitely be curious to find out how many bicyclists ride in the middle of the lane outside the door zone vs how many hug the right side adjacent to the parked cars.

Based on my observations thus far, when there are no motor vehicles waiting to pass, most bicyclists will ride in the middle, but when there are motor vehicles behind bicyclists, bicyclists tend to ride closer to the parked cars.

I suspect that shared lane markings in the center of a travel lane are more effective when there are multiple travel lanes in that direction. In my experience, most bicyclists do not enjoy having a line of cars behind them without any way for them to pass, even when it is perfectly legal and safe for that to be the case.

Regarding the following:
“I propose a solid white line at 10 feet from the curb with a shared lane marking completely to its left.”

I would recommend taking a look at Elm Street in Somerville, which is also one lane in each direction. Shared lane markings were installed there last year at 12′ (or slightly more) from the curb, with parking edge line to the immediate right of the markings. Most cyclists do not ride directly on the shared lane marking. Most ride on or to the right of the edge line. This is mainly because a motor vehicle cannot pass without crossing the center line if the bicyclist is directly on the shared lane marking. If there is oncoming traffic, passing becomes essentially impossible.

I do agree that the law fully allows bicyclists to control the lane and prevent motorists from passing in order to guarantee their own safety. However, most bicyclists do not enjoy doing so and seem to appear to accept a slightly greater risk of dooring as opposed to an angry motorist behind them.