I understand you (we) all have a great interest in architecture and urban development but comments about someone putting up lights on their balcony undermining the "architectural integrity" of the building are sort of comical. This isn't an office building, it is a place that people live. If someone put LED lights on the balcony of their condo of a building built in 1990 I'm sure you wouldn't care. Just because you consider this building more beautiful does not mean that the people living in it should have to live their lives as if they're renting a room in a museum.
Now, that isn't to say that there should be a free for all in terms of "creative expression" when it comes to residential buildings but to go after someone because you don't get to look at life-size version of a scale model from the street or from your computer monitor is ridiculous.