Not totally flushed out, but I think it would be cool for corpses left in a given area to have some sort of lingering and multiplying effect on a room and it's inhabitants. A dead body is no small thing, and the "stench of death" is something you cannot miss.
As it stands now, you could store a pile of bodies in your closet and everything is peachy keen. Just set it by the sweat pants honey!
Maybe there could be some sort of -stat hit or lingering scent that sticks to a character who stays too long in a room with a body, with the effects being multiplied by the stack of bodies? Maybe -charisma makes the most sense?
Or possibly something as simple as the room has a message that grows and spreads to adjacent rooms similar to how fire acts?