what about when people walk their dogs and after the dog poops, the owner thoughtfully leaves it on the sidewalk for someone else to step in. The owner clearly cares about the dog, otherwise they would not have been walking it. But they don't give a rat's ass as to who's gonna step in it once there dog has relieved itself. They are arguably being indirectly morally obligated to humans by walking the dog and therefore caring about its well being, but I think that it directly harming people who don't want to walk in waste every time they're walking down the sidewalk.