So will the mirrors on this stoopid project be blinding the eyes of pilots of passing aircraft and knocking them out of the sky??
The mirrors are shining the light onto the central unit. It would be dumb to make mirrors oversize, so that they were reflecting extra light back into the sky. And any such light will glint from only one mirror at a time, because the pilot would be far from the focus.
Only when the baddies are flying over to bomb our cities, then the national guard will fight them off by aiming the mirrors at their planes.