As I noted in my comment, I am a pilot, so of course I am aware of that. I also mentioned that crushcrashcrush's plan would require closing the airport to "opp

As I noted in my comment, I am a pilot, so of course I am aware of that. I also mentioned that crushcrashcrush's plan would require closing the airport to "opposite direction" traffic on all but the calmest of days: you would have to allow only takeoffs in normal winds, and only landings when the wind reverses. My comment was a tongue in cheek attempt to point out the problems with the plan by taking it seriously. I did forget to mention one other issue: even if you required approaches from the north and takeoffs to the north, it still wouldn't allow you to build taller buildings south of the airport. Airplanes need to be able to go around (abort a landing and take off again if the approach isn't right), so in that case you would be taking off to the south.