User blog comment:TheAzumangaDaiohFan/Upcoming Creepypasta 1/16/15/@comment-24304936-20150116195931/@comment-5321651-20150125002340

Pastas do not get deleted from writer's workshop. Upon posting it on writer's workshop it will be judged/reviewed by users and deemed great/good/bad/whatever.

It is not mandatory, but it is highly recommended. Even some users who have made countless excellent pastas will still post their stories on writer's workshop before officially creating their pasta.