Pre-post-mortem 
Deleting the production database by accident can cause quite some trouble …
http://support.gliffy.com/entries/98911057--Gliffy-Online-System-Outage
“We discovered an issue in one of our backup systems last Thursday night (03/17). Maintenance was scheduled to resolve the issue over the weekend. On working to resolve the issue, an administrator accidentally deleted the production database.”
As bad as this is, at least they have backups.
Lots of related anecdotes in the discussion at https://news.ycombinator.com/item?id=11342968