My initial idea was to have it work like other proposals — someone makes a post nominating the article to be deleted, and we collectively decide whether to do so.
I'm not opposed to a more formalized procedure, though. I want the Commune to be a space where articles can exist even if they're controversial or don't appeal to a broad audience, though. If someone (other than the author) is willing to stick up for an article, I'd like to see it keep its place.
Maybe if the comments on an article are largely negative, it will automatically be considered for deletion, and if nobody (again, other than the author) objects, it gets moved to the "deleted" category.