It would be cool if we could bash/dig up old graves and get back the headless body. Mostly for RP reasons and relocation to other graveyards. Like, there are several graves nearby from various hermits that I would very much like to relocate to my own graveyard, since otherwise they'll eventually decay, at at least one is going to be in the way of a future project.
The recovered corpse would be headless of course, so no abuse there. And yeah someone could just make lots of alts and kill them for a graveyard, but that just doesn't seem like the same thing, it isn't preserving the actual grave in question.