And since damage to parked cars is surprisingly low, I proclaim, that the golden rule might still be valid today.
I'd say the real question is the cost of the infrastructure, and also the fact that power cables themselves are quite valuable (copper). In France the electric cables from trains are already a real problem. Even if you might think it is very dangerous, some people have the know-how to cut them "safely" and sell the copper. Likely to be organised gangs because it takes timing and some logistics, but still a problem. Efforts have been made to lock the accesses to railways, but never underestimate criminals creativity...
