I must have been lucky - I am struggling to remember ever flying an utterly objectionable or disruptive passenger (grumbles for sure, usually about not accepting an overload) - By and large, I have been surprised at just how pleasant HNW individuals and celebs are (I am talking Europe here - I don't know if that makes a difference).
It is just as well, because there is certainly the potential to disrupt flight deck operations if they so choose.