How to Make a Human Blockade Lockbox
I'll admit it, yes, I support protesting. It doesn't matter what my opinions are about any individual protest—overall, it is a human right and the only way to avoid tyranny. We can't deify Ghandi and demonize American protesters. That shows a silly shortsightedness that we can't afford to dabble in.
The first Amendment to the Constitution does guarantee this right, and we should not give it up, even if people don't agree with what's going on. That said, here's a snappy tool (utilizing PVC pipe) that #occupy Wall Street protesters may find useful. It's a way for people to chain themselves together and release quickly without anyone being able to break the bond, except for the people who are bonded.
From History Is a Weapon:
"A lockbox is a piece of pipe by which a person can be locked securely to another person or object. The average lockbox accommodates two people; with several lockboxes and people, you can form a human chain.
Lockboxes utilize the width of your torso and arm-span to take up space. To lock down, you attach yourself to a mechanism inside a piece of pipe; in order for a police officer to unlock you, he would have to get his arm into the pipe as well, but as the pipe fits snugly around your arm, this is impossible..."