I'm about 50/50 standing/sitting. Section 109, Row K. Seems not to be a problem there.
I stand on 3rd Down Defense, 4th Down offense attempts, Red zone offense, goal line defense stands, touchdowns and whenever my knees are cramping. I'm 6-1 270lbs, so I make quite a wall to see around and I try to be courteous to those behind me. My dad is in a wheelchair, so I understand not being able to stand and see.
Did see about 90,000 Nebraska fans sit and watch Frost lose to Troy (where my daughter attends).