Pacifier

Sort of, if the "possible" side effect would become a "sure" side effect, if the contamination of ground water would be poven the use of DU would become illegal.

it is illegal to contaminate the enemy terretory, if this is the weapons main function or not is not importand.
that is why the US ignores all reports, if they would say "ok, there might be a danger" they would face the question "then why do you willingly poison the people you want to free?"

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"It seems to me that the idea of a personal God is an anthropological concept which I cannot take seriously. I also cannot imagine some will or goal outside the human sphere. Science has been charged with undermining morality, but the charge is unjust. A man's ethical behavior should be based effectually on sympathy, education, and social ties and needs; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death
— Albert Einstein