The worst passengers in my view are those that blatantly and purposefully ignore you
- especially on greeting them onboard or asking them a polite question.
It really used to bug me until i considered that they must be that bloomin miserable in general to behave like that.......
Our Nice (France) passengers usually give us a run for our money and come up with a plethora of excuses for an upgrade
I have to say that the only time in 20 years i have seen a passenger make another one cry was an american couple who gave an elderly gentile british couple hell by shouting "you are ruining our luxury holiday experience by talking ", which they weren't loudly- and they just did this to shut them up.
It was the mostly ghastly display of evil self-importance i have witnessed onboard, and we gave them an absolute and deserved dressing down.
Other than that, it is the ones who selfishly bring on 3 large pieces of handbaggage and get nasty when they can't stow it that must be among the worst
