The original intent of the Bill of Rights was to guarantee the safeguard of liberty and prevent oppression of the people. Therefore people have to be armed with the weapons used by the military. This amendment was not intended for hunting, although that is allowed. It is intended for self-defense collectively from federal govt and for personal self defense.
Bill Belichick learned to film signals of opponents from the former Chiefs, and Charger's coach Schottenheimer. Others like Edwards, Johnson and Cowher did too. They learned from the CHEATS and CHEATERS who still couldn't win.