I'll give only one answer to your uninformed and off-topic rant against anarchism.
1)Most anarchists are of the anarcho-syndicalist movement. Organization doesn't go against anarchism: au contraire, real anarchists wanted/want the people to organize themselves collectively. Libertarism is, by far, the most active part of the anarchist movement and most anarchists you will meet (admitting you actually don't "stay away from them") are "libertarians" or anarcho-socialists, if you prefer. Since the term "libertarian" has lost its original meaning in most English speaking countries, here's a "good" definition:
http://en.wikipedia.org/wiki/Libertarian_socialismOrganization doesn't necessarily mean having leaders. A good number of anarchist organizations recognize the general assembly (all members of said organization) as the only authority and use the imperative mandate (from french: mandatement impératif, first used during the Paris Commune of 1871) to get things done. That means you give a well defined task to someone or a group of people and they have to give you answers on how it's going, depending on the nature of the mandate. You then have the power to revoke said mandate at anytime.
2)You speak as if all of these people (at the protest) were united under a same banner, working in the same organization. We had people from all over USA & Canada and lot of different groups. They have the right to protest as they see fit and not take part of any violent action. I'm in favor of a plurality of tactics, ranging from petitions and calls to sit-ins, peaceful protests and, yes, more violent actions. It's as if you were denying the very repressive nature of the States we live in. Can't you see that these people's violence is already a response to the daily violence committed by the State and its police? Anyway, it's getting besides the point: people sure can protest the way they want. If pacifism is your thing, then so be it.
3)There were organizations there and they issued (or collectively chose ;)) directives for their members but there was no leading group/coalition. On a sidenote, you can't "own" a protest. It's not yours to have. Every protest will have its number of radicals. What we consider today as radical was fairly moderate compared to what happened in the past. A handful of billard balls compared to tear gas grenades and rubber bullets? Please. We're far from a rain of Molotov cocktails.
4)I didn't say change never comes peacefully, read again. I said *I* think pacifism has its limits. Even the struggle for India's libertation, led mainly by Gandhi, benefitted from the armed resistance of many: the British occupation lost many soldiers during that time and it was an additional pressure. Like I said, I recognize a plurality of tactics and I advocate the death of no one but we didn't disarm and defeat the fascists and nazis by hosting peaceful sit-ins.
5)Judging by the security present at the protest, our number and the fact that there was a lot of old people and a couple children, I chose my fight and decided to remain totally peaceful. While I respect their right to respond to the police's provocation/agressive behaviour, I didn't see it as a wise move and certainly not one I would have done in these conditions. But then again, that's just me.
Note: Pacific protests worked better when we had real journalists, ones that would do real reporting and were mainly against wars, etc. Still.