The Kansas City Chiefs have a "Fan Code of Conduct," which is essentially a list of rules that fans have to follow when they're attending a game at Arrowhead. In theory, it's not a bad idea, as you'd like your stadium to provide a friendly atmosphere for families and people who aren't drunken hooligans.
In practice, though, it might not be such a great idea, especially if the person responsible for coming up with the rules is an 85-year-old woman who teaches the 2nd grade and regards standing up as one of the evil things that young whippersnappers often do. Seriously, standing erect is the No. 2 item on the list of things that are prohibited...
http://sports.yahoo.com/nfl/blog/shutdown_corner/post/Fans-are-asked-to-treat-Chiefs-games-like-bowlin?urn=nfl,91291
Just another reason why CFB is better than the Pros. You'd never hear of that in such stadiums like Texas (where everyone stands).