Looking For Roboticization/Cyborg Process

[Sunstrider]

From the top of my head, i can remember:
-Future's End: A post-apocalyptic version of the DC universe where all superhumans have been turned into cyborgs by Brother Eye a la Virus. We get to see Plastique, Wonder Woman and the Amazons from Themyscira, Batgirl and Zatanna as evil cyborgs.
-Rage of Ultron, where Ultron somehow goes "viral" and infects a bunch of people. The Wasp and the new Thor are turned into Ultrons.
-Exiles #20, there's a world where the Techno-Organic virus becomes an outbreak and turns most of the world population into machine drones known as the Vi-Locks.
-Uncanny X-Force #5, where the X-Force are attacked by cyborgs from an Earth in which the world's government decided to turn all superhumans into a sort of Sentinel force.

Why the heck do comic book writers think machines can spread like zombies, tho?