I also think it has something to do with the behavior of the fans for the opposing team. There were some Dolphin fans in my section. One of them looked like Vanilla Ice. He was talking trash to the entire section throughout the game. People gave him a hard time but generally left the other Dolphin fans alone. It should be common sense to not heckle the home fans at an NFL game when you have the away team's jersey on. Frankly, I'm suprised the guy didn't get it much worse given the way he was acting.
As far as the booze is concerned, I don't think that the NFL is even remotely concerned about excessive drinking. Pay attention to the commercials during the next game. 30% involve drinking. Teams make a ton of money from concessions and the tailgating scene has contributed greatly to the rise of the NFL in popularity. I believe that many people who attend NFL games care as much about the tailgate as they do the actual game. Drinking will not be severed from the NFL sunday experience. It goes on at every stadium, every weekend, in total excess.