I enjoyed the who watches the watchmen feel of The Office of Community Sousveillance project for Radiator festival, they gave an engaging and thought provoking presentation about the function of PCSOs in maintaining a surveillance society, and of how we can resist this in subtle ways.
http://www.radiator-festival.org/office-community-sousveillance
http://www.radiator-festival.org/
http://www.surfacegallery.org/
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Image from we make money not art