Dallasflyer, if someone asked me what air rage was, I would say that the charming little exchange which you properly admonished is an example of where that starts.
I have witnessed Air Rage. It endangers the aircraft, the crew, and us. It starts ver often from fear and is exacerbated by alchohol and nicotine withdrawl. It can be kicked in by everyone demanding their "rights" and having no tolerance for others. I have watched businessmen behave abominably because they had been denied an upgrade.
To answer the point asked. It is defined as when passengers go beserk in flight for whatever reason or percieved cause. BA now carries restraiing devices, and will use them if the safety of the aircraft is jeapodised. They have not had to yet.
So far