1) Cyber warfare. Taking down critical capacity like food production weakens your enemy. I don't think hostilities are anywhere near bad enough with anyone for

1) Cyber warfare. Taking down critical capacity like food production weakens your enemy. I don't think hostilities are anywhere near bad enough with anyone for this to be an issue at this point; but it would not surprise me if the other major countries are already in our systems and could do this with the push of a button if they wanted to. (Similarly, it would not surprise me if we were in theirs as well). Establishing the capacity to do this at the push of a button, could have the effect of accidentally shutting things down. Either because of a mistake from the attacker, or because the attack is discovered and production is shut down out of an abundance of caution while we figure out what happened. 2) Terrorism. Really, I consider this the same as warfare, just coming from "terrorists" instead of "countries". With this broader base of attackers, I think there are groups that would be willing to do so. The only question is if they have the technical know-how. Given how cheap these ransoms can be ($4.4 mill for the pipeline hack), and the fact that a payed randsom probably a good profit margin, in terms of raw funding, these hacks seem within the range of terrorist groups.