Wind must blow in order to extract energy from it. Therefore, we will never slow down wind to zero with windmills. Also we already have mountains changing weath

Wind must blow in order to extract energy from it. Therefore, we will never slow down wind to zero with windmills. Also we already have mountains changing weather patterns. Sure, the weather patterns will change at some point as windmills grow to mountain size but in this case we will notice it way before it goes out of hand. In an emergency situation we can bring the windmills down at free fall speed with some thermate and gasoline.