For those of you who appear to see the world in black and white , before you condemn someone for sitting please consider that there may be a reason. Sometimes that reason is obvious such as the singer Graham Knight who'se powerful voice surrounds you but who needs sit as he walks with crutches, sometimes the reason is less obvious such as someone with a back injury or low blood pressure or any one of a dozen different reasons. It does also depend on the venue, in some small rooms where everyone is facing each other and there is so little room to stand that to do so would involve disturbing almost ever other person in the room & it's not then apt to make evryone move or wait while you do your prima donna bit. In other venues where most people are standing it's only if you are tall that others can see you.. I know being 4 foot 11 1/2 .. & having heard many jokes along the lines of "stand up, oh sorry you are standing up" hahaha. I guess all I'm saying is that reasons are not always apparent and don't be so quick to believe the worst of people.