I'm familiar with the Area 51->Beta->Graduation process for creating new SE sites, but is there an established mechanism for closing SE sites either permanently or temporarily? Has it been done before?
By "closing" I mean either completely deleting a site and all its contents or just closing it to new questions/answers, perhaps only temporarily. This company blog post from 2012 When A Site Grows Quiet discusses closing struggling sites in Beta, but not graduated sites. Presumably Stack Exchange, Inc. can unilaterally shut down a site whenever they like, but is there a way for the community to request/suggest that they should do so?
This is a general question, but my specific reason for asking is that Writing.SE has basically died since October (see below). There is still some activity there, but no active moderators and the questions/answers that are being posted there are of questionable quality (see e.g. Has there been a noticable downturn in the quality of questions on Writing SE?). Several previously active users and moderators have left and set up an independent fork of the site. The current situation seems unsustainable, and it would be a shame for the existing site content to be gradually swamped by unmoderated stuff.
There are specific reasons for this happening to Writing at this specific time, but it's not unimaginable that it could happen to other sites for other reasons at other times. Is this uncharted territory, or is there a way to put sites like this to bed gracefully?