Everyone from the facility managers to the private equity owners assumed that the plant’s computer network was “air-gapped” -- a term referring to computers that aren’t connected to the internet or another unsecured network. But when Mission Secure installed monitoring devices to check, they discovered that a worker on the night shift was connecting his Roku device to the internet to watch episodes of “CSI: Miami.”

https://www.bloomberg.com/news/articles/2021-05-12/colonial-...

So stuff like this wouldn't happen.