Double Dolphins
I wouldn't do what this person did, but two things to remember.....
1 - he was abusing BA, not your better half (not that that makes it any less pleasant) - I imagine it was not personal
2 - it is wise to change out of uniform before travelling away from the airport
In 2001, as a consultant to BA, I had to be escorted by Polizei from the terminal at FRA during heavy disruption because someone realised I was on duty travel at check in and I was threatened with violence.
Not nice, but these things happen.
I sympathise with your partner.