RPGMemes

I'd like to imagine that this is how non-necromantic sapient undead creatures are created, someone has all their flesh incinerated away but somehow their soul clings to the bones, and bam sapient skeleton.

In this case it could result in a poltergeist, which uses the dust to interact with things.

I’m just going to swing for the fences with the always objectionable, “fiction trumps rules.”

You can be literally obliterated by a sneeze. And you're so dusty, folks would need to make a Con check for allergies.

I mean, from your characters perspective, death is preferable to being transmuted to dust, especially in a setting with a well established afterlife.

I would argue that by this logic, your ability scores also fall to 0, killing you

It doesn't kill you, it turns you into an inanimate object.

Edit: And objects aren't creatures.