A fragile package
After the delivery person carelessly handled this box, its contents were ruined, and it had to be delivered to the recipient in that state. They probably would have believed the ‘fragile’ sticker if they had seen it before mistreating the box.
These caution stickers often go ignored, but what would get their attention? Maybe a table that says, “Don’t be lazy! We’ll find out if you are careless!” That guilt trip might just work.