The other thing to consider here is that much of the shipping process is automated now days (hence the VERY large bar code on the packages) with laser scanners for destination, box dimensions, etc. I wonder how many times during a typical reptile shipping event the box actually touches someone's hands (other than at the counter and the delivery driver).
Also to address this fact, alot of ppl handle every box. A general outline of what happens after you drop it off and who touches it would be
Person you drop it off too
driver who takes it the a hub
one person unloads it from the first truck
one person loads it on another truck to go to the airport
one person takes it off that truck
one person puts in on a plane that flies to one of the national air hubs
one person unloads it off that plane
one person sorts it the another plane
one person puts it on a plane to the destination city.
one person takes it off a plane
one person loads it on another truck to go to the delivery hub
one person unloads it off that truck
one person scans it.
as it rides the conveyor in the building up to 4 people will sort it to get it to the right deliver truck
one person loads it on the delivery truck (this is what i do)
one driver delivers it
Thats 19 different people who will touch one next day air package to get it to the right place, and it could very well be more than that.
Again this is from my personal experience working at UPS, but FedEx is run much that same as we are.