Authors differ in their preference about how to share short work such as ficlets and drabbles, and while other sites have guidelines about how to handle collections of such work, we do not. Authors are welcome to post their drabble collections however they would like.
Please keep in mind, however, that posting drabbles into a single story does not allow you to attach separate ratings and warnings to each chapter. The story, then, must reflect the highest rating and all necessary warnings, or the author can select Author Chooses Not to Rate and/or Author Chooses Not to Warn. Chapters have a space for chapter notes, which will show in the Table of Contents before the reader clicks to open the chapter; more information on the chapter's content, including warnings
On the SWG, we also have the option available to create a series, or a collection of stories that an author wishes to have considered together. It is the preference of some of our authors to post each short piece as a separate story and group the drabbles together in a series. This gives authors the ability to post ratings and warnings for each short piece independently of the others. For example, a single adult-rated drabble need not raise the rating of the other works in the collection.