football in London in my true honest opinion is becoming a big joke. Half the fans don't seem to understand the game. Watching the gIants game a few years ago they booed at regular normal plays. For instance a qb running to extend the play and running out of bounds, Running the clock out when its obvious you will win. Kneeing the ball down just to name a few.
Juan - I think you and most US commentators have misunderstood the booing.
Let me tell you that the very vast majority of fans that attend the games over here DO fully understand the game, we certainly don't see it as a joke. Many have been following it for a considerable amount of time. Those instances where you have heard booing at particular times in the game that you wouldn't do so in the States is where a section of fans have started a Mexican wave and another section in the stadium has failed to continue it. Consequently those fans that have already participated in the wave start booing. This happens every year and will no doubt happen tomorrow, it even happened in the eighties (yes, i know you are too young for that!) when the NFL held pre-season games over here. Hope that clears that up for everyone.
With regards to going to a game that doesn't include their team, i understand why you have those thoughts. But you have to remember that those that are prepared to go and watch these games do so because, unlike those that can manage to fly to the States to watch one, this may be the only opportunity they have to watch a 'live' NFL game. They also go because we love the game.
It is very similar to when English Premier League football (soccer) teams comes to the States during their pre-season. I bet any followers of our football attend those games regardless of who they support (they should support Tottenham if you ask me