"Fragile: Glass" - red rag to a bull?
I suspect just as the bored staff in the packing department have contests, so do the bored staff in the shipping depot. In their case, "can we break it"? I'd suggest that the value of "Fragile" stickers is negative, it just encourages them.
A long time ago I took delivery of a disk drive (back then, 80Gb was the size of a washing machine). I spotted a hole in the cardboard and noted it on the delivery note before signing "contents not inspected". Good thing I did that.
When the engineer arrived and uncrated it, it was clear all was not well. The first sign of trouble was that the "washing machine" was no longer rectangular. A little more instection revealed a rectangular hole through the cabinet. Inside, the wreckage of the controller circuit boards was rattling around. (Today, several square feet of electronics has shrunk to a couple of square inches).
Total insurance write off (back then, ££££). A fork-lift driver had impaled it, and then, for good measure, dropped it from a considerable height. I guess drastic action was needed to get it off his prong before anyone noticed. Or I suppose it might have fallen off a stack in front of him moving at speed. Either way they were happy to send it on its way to become "Someone else's problem".