This is a very very ambitious idea. Since there are 41,000 airports in the world it would be damn near impossible to hand build the airports within our lifetime (probably). My proposal is to allow members of the community to submit their airport models on this forum and be quality controlled by designated people. Of course there are many challenges that I am unaware of that can render this idea as idiotic. Any thoughts?
I believe you can do that but you need to join the 3d building team
As of right now the 3D building team is limited to only several people and will stay this way for the time being.
There is no 3D airport team to join, you are picked to join but no application is available.
More on this will come at some point in the future.