Reason one is that sports fans can cause injuries. The start with, people can get vital injuries if the fans team loses and they go out and wreck everything in their path. Next, some people can even die when fans go on riots or just attack the other team's fans if the other team wins. Also, when a game is going on, the town or city will put extra police on duty because their is a likely that there will be a riot by the losing team and police can hurt people or even get hurt. Sport fans can go too far by injuring people if they lose the game.
