I'm just generally baffled by stuff like this and even to an extent... critical mass.
Cyclists have a great number of rights including that of being able to operate the same way as a motor vehicle. A right in which a majority of cyclists choose not to exercise.
Many cities etc. provide extensive public funding for bike lanes, maintenance, paths, etc. While I realize that some of these may "miss the point" for "real" cyclists, they do appeal to a vast majority of users.
That said, critical mass while having certain intentions initially, has now become NOTHING more than a popularity contest and a general gathering of a group of people that most cyclists wish would read a book or grow up or something. They hurt the situation FAR FAR FAAAARRRR more than they help it.
Similarly, we find oursleves with yet another movement intending to be non-violent that has hopes of getting their municipality to volunteer to close down streets (obviously, they've never tried hosting a USAC race). But why? What purpose does this serve? There are plenty of "closed off streets in the form of bike lanes, bike paths, etc.
The problem isn't that motorists "hog" the roads, or even that they dislike cyclists, the problem is the lack of education applied to motorists in how the entire structure of transportation works. So closing down a street so that cyclists can "use it safely" or whatever other BS they come up with is pointless. Similarly pointless is flipping a car off that has done something if they have no idea what they've done. They just think you're a jerk, and thus cycling is further frowned upon.
The best methods IMHO to solve ANY of this problem even remotely would simply be to look for ways to FORMALLY educate the motorists (which requires actual WORK instead of just riding ur bike with ur buddies when no cars are around
) or simply keep cycling in ways that are "cool" as was so well illustrated by the "10-speed" movement of the eighties, the "BMX" movement of the 90's, and the "fixie" movement of the naughties.
Perhaps instead of devoting all of their resources to such nonsense as closing down a road for a day, to educating in a drivers ed course. The reason that a program like ciclovia might be supported is because it gets rid of those stupid idiots riding in critical mass. It's as simple as anarchy vs. government supervision. Bottom line... eh... I'd just be repeating myself.