No - setting up gear for divers is a courtesy, it's still the individual diver's responsibility to check that it was done properly.
I'd agree... but as a DM in training, you should realize that if you touch the diver's gear, you are taking on some liability and responsibility in making sure it's working.
If it's the boat op's responsibility to change tanks (which it often is on Maui), they should be making sure they changed the tank.
And since when is putting a diver in the water before their buddies something awful? God forbid someone sit at the surface for a minute or two before their buddies join them...
It was noted this is a 13-year-old, whose certification level (if PADI, for sure... not 100% on other agencies) require that she DIVE WITH AN ADULT.
Look at the OP -- her buddies/parents didn't even have their fins on yet!
This would read more accurately if you said "I've heard that B&B has a history of being complacent like this, but I myself have no firsthand knowledge."
Says you. I have first hand experience with this operator in their shop, and the stories I've received and made the judgement by have been told to me first hand. There are MANY more stories that are third hand that would further convince you that this operator as NO business putting divers in the water.
If there's an operator out there that checks the BCD and weights, tests the inflator and air gauge for their divers - great, they're going above and beyond. But it's not anywhere approaching a requirement and it doesn't relieve the diver of their responsibility.
If you assemble the gear, you'd better make sure it works. Otherwise, the one time it doesn't will end you up in court. And you'll lose.
If you point the divers at a tank, and say "set your gear up there", your liability is much reduced. BUT STILL, the tank had better be full.
Think of this -- 200 psi is low, but 212 *bar* is a full tank. If a diver was trained outside of North America, and sets up rental gear on a tank that has ~200-300 psi, he may not realize that this tank is nearly empty (rather than perhaps slightly overfull). It was the operator's responsibility to provide a full tank... yes it's the diver's to check that it's full... but in this litigious society, who do you REALLY think will win that argument? Remember, the reasonable person is now not much smarter than a door knob.