Have they ever given consideration to not connecting the Electric Grid to the Internet?
You don't even need to do that as it happens organically. At my company, we had a comms outage to a wind farm for several days (and the outage was wide enough where even surrounding wind farms outside of my company were affected) and just two days ago, the LEC (Frontier) discovered a bird build a nest in one of the junction boxes which links up to all the plants. All of this happened in a span of five days or so.