[null and void]

As foreshadowed here:

Out of control

Wouldn't object to someone being pinged to this thread...

[Myrddin]

SCADA systems are dirt simple to hack. I've worked on a few that employ microwave radio towers to communicate with devices in the field. Big devices. Pumps with a 60 inch impeller driven by a 12 cylinder diesel engine. The systems were built on a real time ModComp UNIX system and coded with the kind of loving care you would expect from a summer intern writing a first big program in C. The "main()" on one application is over 3,000 lines long. No user written functions.