Why not electrify the fence? (LOL)
How about rigging something up using motion sensing light fixtures (sorry, luminaires), but use a relay instead of lamps, and turn on whatever you what to, a siren, other lights, sound system (I like the idea of machinegun fire) or a call to the police(don't like this last item, ever hear of the boy who cried wolf?)
Low tech, taller fences, more lights, more police patrols,( or more money to local mafia, for protection?) How about moving to a crime free location?
Rick Miell
