I took a package to the local UPS store last week to have it shipped out. Amplifier, not too heavy, packed with great care, no glass, so pretty low risk but even so on each and every face of the box I placed a "Fragile - Handle with Care" sticker and in thick black marker, drew an arrow - "This End Up"
First thing the UPS counter kid does is pick it off the scale, turn around and toss the thing upside down on the cart behind him... There's my package with the "This End Up" arrows pointing down after being quite literally thrown the last 2 feet to the cart... while I'm still standing right there.
Manager's response to my very vocal complaint: "Sorry Sir... it's a busy time of year for us. No worries, you've insured it anyway."
I am still counting to 10...