As a regional CA, and I would've said and done (yes I did it once) as an FO, "don't ask for volunteers. If there's no seats, there's no seats. That's not our problem to solve. We'll get there when we get there, or they'll figure something else out."
Before you light the torches, what would've been worse? The crew not getting to SDF to take out the AM flight (which lets be honest, they would've just delayed to let the crew that flew this flight in get legal rest and DH another crew in to take out this crews "original" flight, whenever that was), or all the negative press associated with this event?
Story time.
I actually had a scenario a few years ago that I will never ever forget. The inbound jet to pick our crew up in OMA and DH us to DTW was late and one of the F/As and I wanted to enjoy the nice free breakfast buffet, they had a pancake machine, fresh berries, etc., so I coordinated with the company to move the van time back. They approved.
Well the inbound DH jet made up an incredible amount of time en route. When we left the hotel, they were already pulling into the gate to do a 50-seater quick turn. No matter; five minutes to the airport and I told the F/O and FAs to head on up to the gate and I'll stop by the ticket counter and tell them to radio up to the gate that we'll be up in a minute. No problemo.
We got there and boarding was complete. But it had been oversold and one passenger was getting a check for $1200 (not a voucher, a check) for denied boarding. The agent saw us four show up and said I can't get you on. I said, sorry we're late to show up but we checked in online last night and either way we have to get on, we're operating three flights out of DTW when we get there, and there is no one else to do them out there. She said too bad, and went down to close up.
The jet slowwwwly departed the gate, come to find out later that the captain was getting OE from the check airman in the right seat and they also had a fed on the jumpseat for the line check. So things were understandably slow and deliberate.
I sat down and got on the phone with my company (who I must give credit for, never once in seven years had a hold que to talk to anyone). They somehow ran this situation up the chain of command through mainline and back down to the DH company real fast, because the CRJ pulled into the runup pad at OMA's 32L and then I wondered...no way...it can't be what I think it is.
Yes, way. A few minutes later they gate returned to toss four passengers off and get us on.
Problem was, during that transaction, DTW went into a groundstop that never lifted the rest of the afternoon...crazy thunderstorms en route. So whereas they would have gotten off the ground before the groundstop went into effect, they deplaned all 50 people and the flight was canceled a few hours later. Their two additional flights were also canceled.
My crew's three flights were also canceled.
And a deadheading crew that was already on board also had two legs out of DTW canceled.
Seven canceled flights because the agent didn't believe me when I said we were positive-space-must-rides.
Ah, outsourcing.