Florida town's water system gets hacked

Wanna bet that water system's computer was on the public internet?  And was running Windows, world's most vulnerable operating system?  The public internet allows hackers from all over the world to try their luck on your computers.  If you just have to have remote control of something, do it over a private fiber optic link.  To hack that, they have to climb a pole, and splice an optical splitter into the fiber link.  Few people know how to splice fiber.  Few hackers climb poles.  And your system will be far more secure if it runs Linux, or Apple, or anything but Windows.