I recently discovered the Space Hijackers, an anarchitect group made up of smart folks who seem to hack the urban environment in various ways.

Our group is dedicated to battling the constant oppressive encroachment onto public spaces of institutions, corporations and urban planners. We oppose the way that public space is being eroded and replaced by corporate profit making space. We oppose the way that users of space are being put under increasing scrutiny and control by those who own or run it. Be this via CCTV installed to monitor us, or architectural elements designed to control our moods.We oppose the blanding out and destruction of local culture in the name of global economic progress. Newer and Bigger is not always better, it is usually both impersonal and imposing.

Through our various actions we attempt to raise awareness of issues within spaces and change how these spaces are used and percieved in the future. We intend to destroy heirarchies within spaces and claim back public ownership. Our projects act as another voice within space, and become engrained upon the places we Hijack.

Have a look at their equipment department, it's impressive. Their ideas are wonderful. My favorite is definitely the Mobile Headquarter: A Mobile command centre to control Hijacker action in the field: French fans would also check http://www.guidedurenard.org/.