WELL PUT! Except for one glaring issue.
The dude flew. He's clearly beyond a talking-to at this point, since he's entered the system as a criminal. If he starts looking for a blame game play, he has a perfect one.
Why didn't my captain ensure the safety of the flight I was operating drunk?
Insert deposition here, add a silly CX here, and BAM.
Certainly the worst case scenario, but then again- how many times can you cite "pilot error" as the found cause when it really honestly wasn't? I realize I'm being cynical, but this could be YOU one of these days staring down such a ridiculous barrel.
The ATA collaborate on all sorts of things, from labor tactics to the MEL (haha). Check your FOM (or whatever you call it) for PIC Authority and Responsibility. My wholly owned realigned that at the exact same time as our mainline, and that doesn't happen without management collaboration.
It's a real eye-opener when you see the implications.