Sirius Cybernetics Corporation?
Are they at it again ?
From "Young Zaphod Plays It Safe" (as far as I am aware the only Hitchhiker's related short story he wrote. https://en.wikipedia.org/wiki/Young_Zaphod_Plays_It_Safe
"Er, Designer People."
"The Sirius Cybernetics Corporation were awarded a huge research grant to design and produce synthetic personalities to order. The results were uniformly disastrous. All the "people" and "personalities" turned out to be amalgams of characteristics which simply could not co-exist in naturally occurring life forms. Most of them were just poor pathetic misfits, but some were deeply, deeply dangerous. Dangerous because they didn't ring alarm bells in other people. They could walk
through situations the way that ghosts walk through walls, because no one spotted the danger.
"The most dangerous of all were three identical ones - they were put in this hold, to be blasted, with this ship, right out of this universe.
They are not evil, in fact they are rather simple and charming. But they are the most dangerous creatures that ever lived because there is nothing they will not do if allowed, and nothing they will not be allowed to do..."