Kinda funny how things have progressed...

I work with the Smoothieware project. The V1 Smoothieboard was one of the first with ethernet onboard (although kinda borked). First thing that was advised to everyone was "never connect this to anything outside your local network"

Nowadays...it seems that warning has been lost. Even in the face of firmware updates that caused physical damage.

Something to be said for building your own printer.