The thing about fotball and similar sports is that people are insecure. If they can be a part of something bigger than their own futile lives for a while, then that's great. And if they can feel a part of a victory, then so much the better.
If you stop and think about it for a second you'll realise that that's pretty much what fotball (and America) is all about. Sure, some people are actually genuinely interested in the sport. I've met and talked to a few, hell, I even dated one. But most people who watch football/baseball/whatever sport you want do it because they need to feel better about themselves. If you try to put yourself in that role for a while you can probably see what I mean. There are probably things about your life you feel bad about, and you probably do something to make you feel less bad about it. Most likely you join a group of likeminded people, to enforce your self esteem, you join an online community, perhaps this one, that you really feel a part of. And instead of sitting and watching football you sit and rant on and on about how blizzard sucks, you analyze and review the human race, you talk shit about other groups. It's basic psychology. Because when you do that you become part of something greater. If the escapist were to win a web award you would feel good about it, you might even feel part of it. It's the same with fotball, or any other sport.
The difference is, "we" don't pay the people who write things here millions of dollars. We don't run around drunk on town in the middle of the night singing "oh, great escapist, we won, we fucking won". And we don't cost the government in the countries we live in tons of money because of vandalism and fighting. You would have an equally hard time explaining why you spend time here, or why you laugh like a maniac when you finally beat that level in starcraft, or when you fragged that guy in halo, or when you blow the whole map up with twenty nukes in Generals as they would have explaining the joy of seeing a jerk score in a football match. You think they are being stupid for enjoying something like that and feel so much joy over someone they don't know accomplishing something and they think you're a freak for feeling so much emotion for something happening on a screen.
There's always two sides to everything. If you try to understand that before you go on a rant about how boring football is, and instead focus on what's really awful about the sport (a jerkoff that runs around kicking a small piece of leather makes millions of dollars while people starve in many places in the world. Vandalism galore, and a lot of stupid drunk people feeling strongly, almost fanatically about opposite things gathered in a tiny area), you will have an easier time understanding, and saving yourself from a lot of negative emotions. You might also make a difference for the better in the world. No one is going to care if you scream "ban fotball, it's boring" (as little as you'd care if someone shouted "ban computer games, they're too complicated for my brain), but if you instead scream "ban fotball, it hurts the economy and is a health hazard, not only to the fans who fight themselves, but innocent bystanders as well" someone might actually care and it might lead somewhere. If we're lucky. One day.