Oddly enough the British, normally bastions of civilized behavior, were against the portion of the Geneva Convention that outlawed these types of ammunition.

Their reasoning?
When wounded, a civilized soldier lies down and awaits aid. The savage however presses on with his attack.
They were afraid that their frequently outnumbered colonial troops would be put at a disadvantage if they were denied the use of a round that was designed to cause the maximum wounding effect.

No, I'm not making this up.