Dixie has a lot of add ons to OBR for the sake of safety. Allegedly.
I call a lot of Dixie and have seen the helmet issue arise only once. Bases loaded, batter walked, R3 coming home takes his helmet off about halfway down the line, and then starts "dancing" down the base line, apparently to show off to and taunt the other team, who they were beating pretty well. Plate ump warned him, kid didn't put it back on, so he then tossed him for what he deemed unsportsmanlike conduct. And yes, all hell did ensue.