Here's an article that explains the real reasons I am wary of global trade liberalization. This overarching injustice is what moves the thousands of protesters - at least as much as any anarchic / dionysian protest vibe or testosterone-fueled affront to police power:
"The administration's selective adherence to its professed principles confirms criticisms that public interest groups have long lodged against the agreements. One is that far from promoting free trade, the agreements favor power and privilege, and allow wealthy countries like the United States to flout them. A second is that trade principles degrade democracy and national sovereignty by inhibiting countries from legislating in the public interest."