We are amidst a global crisis. A covert dictatorship has forced many into slave like conditions where they work like a plow horse until the day they drop and our sold for slaughter; never giving up on the dream of becoming a middle class consumer. The few that are consumers act like the family pet at they obediently follow the capitalists commands in order to continue their privileged lifestyle. Meanwhile, children are homeless, the ice caps are melting, millions go hungry, and bombs kill hundreds of thousands just to keep the power structure intact.
It's obvious that the privileged (those the capitalists would like defined as consumers) cannot exist without the underprivileged (those the capitalists would like defined as producers). If everyone was equally privileged the word would no longer have meaning, and the system that feeds off the structure would cease to be.
The underprivileged risk everything when they rebel and define themselves. Agents of the dictatorship are much more apt to reward them with draconian sentences -- such as deportation or even death by cop -- than those of us that are more privileged. Often, the privileged -- afraid of losing that privilege -- will judge this rebellious behavior with pleas like, "if you only sit and roll-over as commanded you to can gain some of our luxuries."
"Don't liberate me -- I'll take care of that."
Our privilege (be it skin color, gender, sexual orientation, legal status, the ability to read and write English, etc.) is not going to disappear regardless of how much righteous indignation we have. Still, with the knowledge that we are privileged, perhaps we can chew through our leashes, busy the bosses and their guns and give those in iron shackles a bit more space and time to free themselves.
So, grab those black masks and other various garb. In this dying world there is much still to be done, and so little time. The black bloc is one of many effective tactics to help turn things around. See you in the streets!
[For more info on Black Blocs please see http://en.wikipedia.org/wiki/Black_bloc ]
[For more info on Mayday please see http://portland.indymedia.org/en/action/mayday/ ]