What we absolutely shouldn't do is let people with a desire to classify themselves as "naturals" classify what a natural is.

Don't think its that big an issue really.
The LD community has a rigerous obsession with classing MILDS, DILDS, FILDS, WILDS, if it moves we, as a community, manage to classify it.
It serves a useful purpose.

Not sure why the term "Naturals" should be considered so special.