The real-life sport of Quidditch was inspired by the Harry Potter franchise but has since changed its name to Quadball. Organizers hope the name change distances the sport from the social positions of author J,K. Rowling, perhaps growing the sport.
Quadball refers to the number of balls and positions in the sport; its playfield governed largely by field sport codes and standards.
Readings: The “30-30” Rule for Outdoor Athletic Events Lightning Hazard