When I worked the loading docks for FedEx in college, it isn't a question of spite. It's overuse of the "Fragile" stickers without adequate packaging.
Take, for example, the current crop of TVs. Some idiot orders one from buy.com or walmart.com, and a 52" TV that is delivered to the stores, 3 at a time, banded to a skid, is instead just picked up, a shipping label slapped on it, and out the door to the UPS/FedEx/other small parcel carrier of choice. These items are not packaged correctly for that kind of shipment- which is why, if you read the fine print, most carriers are not liable for damages to them.
Or, for a more "WTFBBQ?" example, let's say I'm shipping, to you, restaurant-grade plates. Nice, solid, plates, dishwasher safe. If you were a restaurant supply business that gets these in regularly with the "FRAGILE" markings all over the package, you laugh at the labeling. Inside, there is a latticework of corrugated cardboard, if you're lucky double-walled, that seperates each plate into a compartment. There is no other packaging. No bubble wrap. Nothing to hold structural integrity. There is about 50 pounds of china in this package, and each plate is separated from it's neighbor by.... a piece of cardboard.
After watching packages like that come through, over and over again, people quit caring about "FRAGILE". If the shipper can't be bothered to package something in a manner that it would survive a 3 to 5 foot drop (depending on carrier) the carrier isn't liable anyway. People tend to put more and more stickers on things that are packaged poorly. If it's packaged well, short of getting run over by the delivery van, it shouldn't be damaged in shipping. Not that accidents don't happen- FedEx, for instance, uses conveyor systems to get packages from trailers to the delivery vans, and the system allows for "sorters" to push packages off one conveyor down chutes to a second. In theory there should be no damage here, again, but sometimes packages will jam in the conveyor, or stick in the chutes, and before the busy handler notices there is a 145 pound UPS battery pack jammed up against your mother's crystal. It happens.
Add in people who ship lawnmowers with oil already in the engine- "THIS SIDE UP". Well, newsflash: it has to go in the delivery van. There is only so much room in one of these, and if your box doesn't FIT under the shelves in the back "THIS SIDE UP", and doesn't fit in the aisle between the shelves where the driver can get around it, it WILL end up on a side, probably leaking oil into parts of the motor it shouldn't be in. Far too many shippers don't actually know how packages are handled once they leave their facilities and just assume "cheaper is better".
If I seem bitter about this, it's because I've seen a lot of it. I've been the guy sorting between conveyors and had a poorly packaged box spill shards of glass all over. I've watched co-workers take a bath in acid because some idiot didn't know how to package his hazardous materials for shipping. I've had a printer from a major manufacturer get shipped in the nice shiny cardboard box you see it in at the store, with the single strip of cheap tape holding the box shut fall out of the bottom of the box when I picked it up. I've lost count of how many times I've seen someone cram a box that was too small for the contents just so they wouldn't pay the upcharge for the next size up oversize shipping. Or hardcover books shipped in cheap, paper envelopes that are just a half inch too small- so the corners of the books tear the paper, regardless of handling. Shippers tend to look at it from an overall business perspective. It's the Fight Club recall thing all over- if the cost of better packaging is more than the cost of dealing with damaged goods, they'll keep the craptastic packaging.