I'm curious what distinction you're drawing that makes the first acceptable but not the fourth.
Edit: Upon rereading, this seems more confrontational than was intended. To clarify, I agree there's nothing wrong with the second, hold reservations about the third only insofar as it's not clear to me that there really is no harm involved, and have simply never thought much about the first or fourth.
I believe there is harm done by the third, because I value the existence of natural beauty even when I can't see it, and there are other problems with destroying unpopulated places as well. I have only a minor problem with the fourth. If it is known that the graves of people with no surviving relatives are often desecrated, this may make currently-alive people sad about their or their loved ones' graves being desecrated later. If nobody knows about the desecration, it's probably okay (excepting TDT-style concerns about people predicting future desecration from others' moral opinions).
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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