Yeah -- necrophilia strikes me as more a normative transgression than one whose a priori immorality is obvious or defensible; quite a bit moreso consenesual sibling incest.
I know of no places in "the environment" (at least on Earth) that aren't populated; I feel a fair bit of empathy for living things generally (even plants), but even if one assumes that it's all meat-automata with no moral weight as so many LWers do, the negative externalities and oft-unrecognized-but-real value of biodiversity to human endeavors makes this seem like less of a victimless transgression.
It is at best as victimless as destroying a great work of art that is rarely seen.
The playa of the Black Rock Desert appears to be completely lifeless. I haven't checked for microbes. (And I don't care if anybody destroys it; it is too simple to be interesting or beautiful. No great work of art, that. Ironic that that barren, boring, lifeless mud flat is taken better care of by burners than are most places on Earth.)
The following are extracts from the paper “Is Empathy Necessary For Morality?” (philpapers) by Jesse Prinz (WP) of CUNY; recently linked in a David Brooks New York Times column, “The Limits of Empathy”:
1 Introduction
2 Is Empathy Necessary for Moral Judgment?
3 Is Empathy Necessary for Moral Development?
4 Is Empathy Necessary for Moral Conduct?
5 Should we Cultivate An Empathy Based Morality?
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