In my time working on the ramps for one of the major carriers I learned a few things.

First off. All the ramp workers loading your parcels are paid jack squat, aside from one or two of them per shift. They don't care at all about your package. The biggest concern working there is that you not get paired with a thief so as not to lose your job for them opening a package...that's another story.

ALWAYS over pack your item. Make sure it can be handled by the Samsonite Gorilla...because it will. Never mark anything fragile or that it has liquid inside, etc. It comes across as "challenge accepted" with most of the package handlers. If it is an item that you can't lose, over insure it and make sure you understand the terms of the insurance. In some cases if you cannot produce receipts proving the value (of the item shipped) you are screwed (like USPS).
When an item is destroyed, knowingly or accidentally, it has to be shipped to the destination regardless. The person getting the package has to file the claim.