Sure, the behaviour of some QA passengers is unreal, no question. I remember, for example, a QA flight where a guy was told to turn off his mobile. He refused and had it on and was talking during take off and the actual flight.
I think many other airlines would have had him taken off the flight.

Have to say though, never had any problems myself with QA.
Although what happens in the cabin concerning some passengers endangering others with their behaviour scares me a bit.
Ah well, nothing I can do about it, apparently.