Author's Note: Victims of the System Havoc Implementation Team seem impelled to call out their acronym - loudly and with much repetition.
(clockwise from top)
Bluescreen Bob the Gremlin Yob - highly unstable; quits, freezes, crashes and hangs
Sirus the Virus Goblin - bugs, worms; systemic infection; fraud, exploitation and espionage
Doctor Digit the Binary Boggart - data removal, sabotage and corruption