To the sender, a "FRAGILE" sticker means, "please treat me kindly, I'll break easily.".
To the over-worked, under-paid, disgruntled carrier employee, a "FRAGILE" sticker means simply "kick harder, throw higher.".
In the parcel handling industry, the workers get kinda pissy when something says "fragile" for some reason taking it as a personal insult or a challenge.
|Apparently Just a Suggestion|
Also another form of going "postal", I suppose.