In a place like the DMZ, are mines really immoral? Are land mines universally immoral? Anymore than any other weapon of war? Does this immorality extend to naval as opposed to land mines?
No one is walking freely in the DMZ. Certainly not children. If land mines are effective (US generals say no, but they don't win too many wars.) they raise the cost of attack almost for free.
This stabilizes the situation avoiding what would be a devastating war.
Some object that a war that gets rid of the North Korean regime is necessary and not to be avoided. I wouldn't necessarily disagree, but point out that I chose the DMZ merely as a widely known dangerous example. The example can be changed to any border dispute between two "dangerous" countries (say India and Pakistan).
Nor can the "indiscriminate nature" save the argument. A cluster bomb thrown into a city is indiscriminate and a terrible thing. But the immoral act is deploying the weapon where it acts without discretion. This is no different from carpet bombing city a la WW2.
So the question remains: why are land mines malum in se? And how are the uniquely evil compared to any other weapon of war? [1]
[1] Im not being facetious. I believe there are inherently evil weapons, chemical or biological ones come to mind, while other weapons have, if not a nobility to them, are not inherently evil: the rifle.