Our system has had several substation break-ins, resulting in copper theft. So far they have only taken the stuff that is close to the ground. I'm afraid that eventually we are going to find someone half baked , on the steelwork. As far as pole grounds, out on the sytem, so far we haven't had any of that, at least none that has been noticed .We also had 3 trucks ,that were at a jobsite, get stripped of all the copper, overnight. Normally the trucks are in a secured area, but these weren't. Of course if they are willing to cut the fence at a substation, I guess it probably wouldn't have mattered if the trucks were fenced in .