Yeah, well, when I drop half a grand on tickets I really don't want someones fat drunk ass in the way!
(Joking; I have never bought tickets, much less dropped half a grand on them. I would like to, however.)
I think that is some folks mentality especially when they pay a premium price. They don't want to stand and want an unobstructed view of the field. They aren't there to root and cheer and go nuts like a lot of folks in the cheap seats. Then again maybe some of the lower level folks have more money to spend on alcohol and are too loaded to be able to get out of their seats and stand. Who knows???