"I've seen other divers' "normal" dive bags get trashed from the airlines."
"take the worst punishment that the airlines can dish out."
I get really up set when peole start blaming the airlines for damaged bags. When you check into an Major Airport, your bag will travel on an maze of a conveyor belt system. This system moves at a high rate speed as it needs to move 30,000 bags per hour on avg. When travellers do not properly secure the zippers, handles and any other loose thing that hangs from the bag. These items get hung up and rip the bag from the following bag SMASHING into it. I am not saying that the odd guy doesn't rip or smash a bag, but 95% are due to the belt system. So to help yourself out, put tape on your zippers and handles and take the carry strap off and put it in the bag. These little will help keep your bag on the move.
I agree with what you say, and I'm careful with extra straps and things that could get caught, but I've also witnessed the airline baggage handlers loading my luggage onto my plane while I was waiting at the gate. They were taking the bags off the trailers and tossing them about 10 ft onto the ground so that the other handler could then toss them onto the conveyor belt that went into the cargo hold. That's when I realized that the old tv ad with gorillas beating on the luggage was not that far from the truth.
dd