Depressing thread.
Sadly, this kind of behavior happens from time to time: It is always unacceptable and there is no excuse.
As Cabin Crew, I strongly resent those individuals that bring our chosen career into disrepute. This kind of incident helps form and maintain an impression of Cabin Crew that can be hard to change.
The rapid expansion of air travel has resulted in the recruitment and subsequent promotion of some people who are inappropriate for the job. As passengers you don't want them on board - those crew who care don't want them either: Our job just became a tiny bit more difficult to do as a direct result of this incident.
If you can summon the energy, write to BA and ask them for comment.