I had no idea you had to protect yourself from breeding magpies!
Those bike helmets with the decorations on it seem good, but if I were to face these magpies while walking or riding my bike, I would prefer to wear a better helmet like the one used by the postman. I would want my face to be protected too, not just the head!
In my country it's against the law to not wear protective headgear when riding motorized vehicles, like motorcycles, scooters, etc. Even though we don't have magpies, we have to wear the required helmets.