Best one yet.
That yellow zone is mind blowing. More than even the east of Milan, south of Brescia, north of Parma and west of Vicenza square. Here is what I think is far more effective and I'm playing the devil's advocate here. Make these yellow zones inverse cones which reach their widest point at 400 feet or 120 meters. Or hell, make a 120 meter from takeoff point the absolute limit. Look, I've flown up to 500 meters. It's overkill. Want to fly on mountains, take off from a mountain. A nuisance, sure, but a pill most can swallow. Easy to put on sales advertising. Max altitude, 120. The problems out there are mostly born out of real, or perceived, flying over 400 feet over heavily populated cities. "Oh, saw drone outside the window on Southwest flight." Sorry, our drones only go 400 feet up. And again, inverse cone with even lower altitudes nearing the center. This would clear up all the model airfields that sit smack in the middle of yellow zones. Zones which one is allowed to fly far heavier turbine rc of 200+ mph capabilities with no unlocks required.