For the Willard-Dempsey boxing match of July Fourth, 1919, a purpose-built, one-time stadium was constructed. To prevent gatecrashers, the arena had only one entrance/exit. 90,000 were in attendance. If a fire had broken out (perhaps if the management hadn't banned smoking), what would have been the broader effects of potentially tens of thousands of casualties at such an event? How would sports in general have been impacted?