[datagramm]

"The only use case I can think of is hackers / pirates / terrorists. I could see them running a computer which has the red button ready to go and taped to the outside of the case to destroy evidence as soon as police try to kick down your front door."

I'd imagine this was the manufacturer's intention. If you're going to the trouble of building a computer with an instant self-destruct feature, you'll probably put the button somewhere accessible.