Zero liability. That is, unless they stampped in large red block letters on their app "UNSAFE TO FLY DUE TO MASSIVE PSYCHOLOGICAL ISSUES" and then kept that in their file for future subpoena by the ambulance chasers.

I doubt they are that stupid or sloppy though.

"Applicant was not offered a position at this time". That's it. Or they could go nuts and say "applicant did not fit the culture of our company". Either way, there would be absolutely nothing to sink any teeth into otherwise every single interview by a parent company would have to be be an automatic hire and we know that's not the case and never has been.