"Stand when the situation calls for it (3rd downs, 4th downs, etc), sure. But to stand for the sake of standing is idiotic. It seems like people that do this think this will win the game for their team... it won't."
I agree with the statement above. I've been in this discussion before where guys seem to think that there is a direct correlation between their standing and yelling for the whole game and us winning. I would argue that it is much more important to have strategic variations in intensity. For instance, standing and yelling for the opening kickoff is key. As is standing and yelling on key 3rd and 4th downs while we are on defense. And sometimes, it is important during key offensive situations. However, there, we need to read the coaches and players to see if they want us to be quiet so that they can hear each other audible.
The raising and lowering of the sound level in a stadium can have a great effect. It is clearly seen in the impact of fans as part of Hilton Magic. They know when to get up and make noise. Constant standing and yelling just becomes part of the background. Strategic variation adds real impact. Just think about what it is like for an opponent to have a normal roar going on during 1st and 2nd down, but have a deafening roar against them on 3rd down.
Let's stand and yell with our minds, not just our hearts.