No Fly Zone my ass,rarely any regular dares to play a uneven match from the President Side in NSA Map especially Hydra vs Presi Spawn, even before the No Fly Zone Disabling post was made people were able to kill with Hydras in President Spawn. I myself have died countless times by camping Hydras at spawn and Yes I was in the spawn well near Toreno's Ranch. I even have Video Evidence, I'd thought people would suggest to making the No Fly Zone Better but instead they want to disable it to make it even more easier.
I am surprised curry's post even got approved and locked since Hydras killing President at Spawn is a nigh common thing.
And there are indeed solutions to counter it.The whole back side of it is fully open.
If President camps at the lower floor you can easily kill him with Rifle or Sniper. Or if you are willing to do ballsy, get a rustler there and spam the quad m4s and if it explodes it will damage the security and president.
If He camps at the upper floor, get on top the roof and nade on his position so the splash damage deals below since the roof and upper floor are so close.