Raise the rails

Last night another man fell at sporting event this time in Houston, at the Texans preseason finale against the Minnesota Vikings. Why are the fans now at risk at a game? The league has put so many new rules in place to protect the players. Does he need to implement rules on the fans as well? This type of event is becoming far to common in the last few years. Are little children going to stop coming because there parents fear that they may get injured/killed? If that happens the process of the next generation falling in love with sports will be broken.