Activists in Germany have apparently been attacking video surveillance cameras and performing a number of other interventions to demonstrate the lack of ‘security’ and the unequal outcomes generated by these systems. There’s a great report on this with video and pictures from The Observers on France24.
ubisurv 
Turns out to be even more interesting than it seemed at first: it seems this has been turned into a game of sorts by activists… http://www.guardian.co.uk/theguardian/shortcuts/2013/jan/25/game-destroy-cctv-cameras-berlin