I responded to a troll last night while we were producing WeatherBrains; I deleted the post and wanted to be sure it was written in a better, more accurate way.
People have indeed died and suffered injuries from lightning strikes during organized sports/football events. Some examples...
*An Ole Miss coach and two ABC-TV employees were stuck by lightning at Bryant Denny Stadium in 1994. Mississippi linebacker coach Mike Grant was burned during a thunderstorm; the lightning went through his headset and into the transmitter attached to his belt.
*During the 1991 U.S. Open (Hazeltine National, MN) a bolt struck a tree by the 11th hole where spectators were sheltering, killing one spectator and injuring five others.
*2012 Pocono Raceway (PA): Shortly after a NASCAR race was called due to rain, lightning struck the grandstand parking area, killing one spectator and injuring nine others.
*Minutes after the conclusion of an NFL game in 2014 between the Packers and Buccaneers in Tampa, a lightning strike hit the stadium grounds/parking area, injuring seven people and sending them to the hospital.
*September 1970 (Gibbs High School, FL): A lightning bolt struck directly into an offensive huddle on an open field during practice under skies where rain hadn't yet started falling. It killed two players and injured several others, temporarily paralyzing another teammate.
People drove without seatbelts for 60 years too. Surviving pure luck doesn't make an open metal stadium safe from 300 million volts of electricity.