Suggest we implement a community wiki sandbox to minimize issues related to long work-in-progress drafts. Here's an example from meta.math.se:
Excerpt from above:
- This sandbox is intended for saving drafts of long, complex answers, especially answers whose composition takes a long time. It serves to localize to one thread the front-page "bumps" caused by edits to drafts of such answers, so that they may be easily ignored. Also, it helps to guard against losing longly-composed answers due to system crashes. When you are happy with your draft here, you may simply copy the code and paste it to the desired location.
Related links for reference.