[rx]

Along the theme of today’s ransom-ware that has plagued tens of thousands of companies’ computers worldwide...

I’m sure lots of Jokers out there will be trying to figure out how these units can be turned into a tool for their personal extortion/blackmail jackpot.

[Dr. Sivana]

I’m sure lots of Jokers out there will be trying to figure out how these units can be turned into a tool for their personal extortion/blackmail jackpot.
Any reason why they HAVE to be on the Internet? Heck you can use the power lines running from the station, preferably hardwired to a remote site, using a proprietary system or a revised version of some old network technology (e.g. Banyan Vines, DECnet) with no TCP/IP anywhere.