This misses the point of NFZs. A plane hitting a bird is a natural occurrence and cannot be avoided for the most part. A plane hitting a drone is completely avoidable and caused by one party's departure from their airspace. Just because an airplane can survive a hit with a drone does not mean we should be allowed to share airspace. The rules that are in place are adequate. If we are involved in an accident with an airplane we loose a few dollars, the airplane has a chance of loosing a few lives.