As a result of the recent NBA fight and the T.O. spitting incident, I have a suggestion for professional sports organizations:  Allow fights.  Let them happen.  Heck, even encourage them.  Under two conditions:  Players must fight by the rules, and a referee must be nearby to enforce the rules.  The rules should be something like the ones in the UFC:  Wear lightly-padded gloves; fists, elbows, knees, and feet can be used for striking; points are awarded for takedowns and grappling; a winner is decided by knockout, submission, or a judge's decision.  Other than that, just let them go at it.  Professional male athletes are positively brewing with testosterone.  And a lot of guys get pretty emotional whether they're winning or losing.  Fighting is inevitable.  So instead of making it a national spectacle every time there's a major fight, set up a system that enables players to fight in a relatively safe and fair manner.  And just think of the marketing potential.  It shouldn't come as a surprise (though it does for a bunch of people) that fights during sporting events are exciting.  They're fun to watch.  Every time there's an extra push or a shirt-grab or a face-to-face verbal exchange, the fans are on the edges of their seats, fists in the air, ready to cheer on whoever they think will win.  Can you say typical male demographic, ages 18-35, mildly athletic, interested in sports/action/fighting/aggression?  Can you say captive audience? 

Let's face it, fighting during sporting events is inevitable.  Why stop it?  Let's see some fights.