Chicago has a glorious skyline
...and it'd be a shame to ruin it like that. I remember the first time I ever visited Chicago...the plane flew over the downtown area, way out over the lake and then back, low over the city center to O'Hare. It was a stunning introduction to a magnificent city.
Pictures of that building were in all the Chicago papers, of course, and my initial amusement turned to horror as it became evident that someone was serious about it.