Where were these people in Detroit a few weeks back? This is the answer to the sports fan vs. player dilemma. Keep a line of taser wielding security around the perimeter of the playing field. You got a fan trying to get on the field/court? Zap! You got a player going in to the stands? Zap! You got a nut throwing beer or batteries? Zap! You got nuts attacking old coaches? Zap! I see no downside to this. None. There is no excuse for any stadium/arena not running with this idea.