Or, unless simulating where the new 20th floor windows will be, and takin a picture from there... where windows will soon be.
If building a building with windows there, and then taking pictures out them, would be legal, then flying a drone and taking pictures from the drone, in that airspace, is not significantly different.
The only thing disturbed was somebody's sense of entitlement to an undisturbed view. Someday soon there will be people who are allowed to own cameras, in that same airspace, except it will be a building then. I recommend the upset party purchase the adjacent lot from which the drone was flown, to stop such an 'outrage'.