system for protecting a group of location of a network by anticipating an act of vandalism . a monitoring apparatus connected to detection apparatus on the location in order to establish in real time a modification of the state of a location as a result of an act of vadalism , a storage apparatus for storing the fixed characteristics of each location , a processing apparatus and a display for displaying the result supplied by the processing apparatus . this processing apparatus is able to communicate with the monitoring apparatus so that it can be informed in real time of an act of vandalism affecting a location , store the characteristics of the vandalized locations , determine the trajectories of the vandals , extrapolate said trajectories to forecast a location liable to be vandalized and inform an operator by supplying using the display means information in such a way as to protect a location liable to be vandalized by anticipating the trajectory of a vandal .