Each year, roughly 70,000 people are treated in emergency rooms because of equestrian-related injuries. Thousands more are treated in physician's offices. Head injuries account for about 20% of emergency room visits and are the leading cause of hospitalizations and death. Studies published in the professional journals Injury and Pediatrics concluded that "a significant decrease in those admitted with head injuries is associated with the increasing use of protective helmets."
Barrel Racer Wears Troxel Helmet at National Finals Rodeo
I say wear your helmet. Your life(and your quality of life) is more important than their opinion.