I'm a very HARD CASE when it comes to this type of thing.... and I believe, I'm serious here, that brawls at public sporting events should be HEAVILY penalized.. prison time. Granted, not easy... if you're simply protecting yourself, or another, that's understandable and probably difficult to determine... BUT..
To start a brawl at a Pee Wee game, or in the stands at an NFL game... means to me that you simply DO NOT CARE if you kill a kid in process. Your temper tantrum trumps the lives of all around you... you have to be brain dead to not realize innocents in a crowded stadium cannot escape.