Agree with LBJ's two bullets. But this is a battle that will never be settled, near as I can tell. There will always be people who want to sit on their hands all game, and there will always be people who want to stand, either all the time or at least during key moments.
I typically fall into the latter category (stand during key plays), though I pretty much stood for the entire Penn State game (as temperature and excitement level dictated in Section 117).
My bottom line is a bit Draconian though - If you really insist on sitting the entire game and harping on others around you who are standing because you refuse to. I have two suggestions for you:
1) Procure seats in an area where you can sit without interference from standers around you (sit on the rail, club seats, etc.)
2) Turn your head towards the jumbotron and watch there if you are too lazy to get up off your rear.
If you are elderly or infirmed, then get yourself into the seats designated for people with special needs. There always seems to be plenty of these wide open, particularly on the upper deck top walkway/concourse.
And before you get after me for being 'unfair' to those with conditions or lack of resources to get the seats where they won't have to stand, remember that other conditions in the stadium can make it uncomfortable for others or all, but you just have to deal with it (namely weather - rain, snow, extreme cold/heat, or otherwise). People standing is simply part of going to a football game. Just like a rain shower or bitter cold.
