Re: Some hysteria
This isn't hysteria at all. Say you, a construction company, wished to gain a better market share. Given that your methods would be as near optimal as makes no difference, your only options are to shave margins, cost-cut or perhaps inflict some reputational damage on your competitors. However, casual website defacement will only go so far, so how's about messing about with their heavy plant remotely?
The thing is, you do not actually have to do very much to a remote-operated crane to make operating it dangerous to the point of site Health & Safety shutting everything down pending investigations. Listening to the chatter from operator to crane then replaying segments back at the crane would do, if the systems are as insecure as this article suggests.
Brief replays would make the crane overshoot targets and bang into things, behaviour that seriously upsets people where heavy weights are concerned. Five minutes messing with a crane remotely and site H & S shuts everything down to investigate. The attacker waits a day or two, then repeats at random intervals. With a parabolic antenna they don't even need to be very close to the target; half a kilometre or so would do.
All of these shennanigans push the project over time. Builders who overrun don't get repeat business.