Couldn’t let this go by without some comment.
I attended the Quebec City demo, one of the more vilified manifestations to have taken place in the anti-neoliberal circuit. I was in “the shit,” if you will; like thousands of other activists, I was up near the fence, in particular at Dufferin-Montmorency and St-Jean-Baptiste, right in with the tear gas and water cannon.
Total number of activists who participated in the demos: between 20 000 and 30 000.
Total number of violent people: estimates vary, but top out at 100. Of the thousands of activists I saw during the weekend, a total of 5 people were hucking rocks. Other activists were standing far apart from them, yelling at them to stop or otherwise isolating them.
And yet the police continually fired tear gas away from the ones throwing things, at the peaceful crowds scanning slogans or participating in speakers’ corners, and indeed at completely peaceful commercial areas at the bottom of the cliff, blocks away from any protest.
As for setting random fires, I personally witnessed a group of twenty activists using up the water they had brought to wash tear gas from their eyes, as well as buckets of water brought from a medical centre (which was later tear-gassed and forcibly evacuated) to extinguish a fire. But I know how inconvenient extraneous data points can be.
I’ll also have to disagree with your characterization of the demographics. The People’s Summit and the protests themselves brought together people from all walks of life, and from all parts of the hemisphere from Vancouver to Porto Alegre. Raging Grannies, union members, aboriginal groups, civil society groups, political parties (including the entire caucus of the NDP), and yes, university students, who I was unaware were barred from having political beliefs and expressing them through the time-honoured medium of political manifestation.
I started to get a little bit suspicious of the coverage of the demo as I watched the tube and saw the same protester huck the same rock five times in half an hour. This makes me, as someone who was actually there, suppose that the received wisdom about the conduct of these protests could perhaps stand a little analysis.