"Those sorts of textures are very useful if trying for a degree of realism in battle scenes , crime pics , etc."

Of course, were that the intent, perhaps a crime scene, morgue/hospital prop would be included.
I'm kinda thinking this isn't being made for the benefit of the aspiring medical/forensic student.

To be more specific, I'm not arguing the morality of it, but rather, what I see as a duality of acceptability.

of course, i would be more than happy to argue the morality of it, if prompted to do so. ;)