Joking aside are these the most potentially seriousl vulnerabilies seen outside of Stuxnet?
Stuxnet was designed to seriously damage enrichment centrifuges loaded with Uranium Hexafluoride, which would be pretty nasty even if it wasn't radioactive (a dab of water vapor and you've got a cloud of Hydrofluoric acid in your face, which is best avoided if you want to have a face left).
Here we have the option to trigger site evacuations on demand, or conversely a no inspection pipeline to take nuclear material out of a plant. What's very disappointing is this kit looks like it costs serious money and is only installed by serious people who are worried about some very nasty s**t indeed. :-( .
Granted, outside of fiction actual real full on "nuclear terrorists" are virtually unknown but with IoT security this loose (plaintext data transmitted by wireless, and hence readily forged) how many of the regular sort of terrorist, or just general nut jobs, wouldn't be tempted to take a punt?
It seems it doesn't matter how expensive the IoT hardware is, the security level is still s**t.