Back in the Wage Slave days, a story would go around, about a way to play a dirty trick on a coworker: One day, when they are out, write “DECEASED” on all the mail in their inbox, and drop it in their outbox. It would take months for them to repair the damage.
But it could be worse. This was posted here, yesterday: https://news.ycombinator.com/item?id=48037923