You guys have this all wrong I think. The FAA is not against residential airparks. They are opposed to through the fence operations. Where an adjacent development just paves a taxiway to gain access to the public airport.
Through the fence operations are against the airport stipulations that they agree to when they accept federal grant money. They want to make sure that all people pay a fair and non discriminatory cost for activity on the airport. This helps ensure that the facility remains open to the public in a safe manner and minimizes the cost to the community for the ownership and upkeep of the airport.
Again the FAA is concentrating on the through the fence aspect of it. That is a residential airpark or a private access to the public airport that is the problem.
The issue is that the airport and the taxpayers have paid for the infrastructure etc of the airprot and some group of people are gaining access to this for free. That is anyone else on the airport must pay hangar rent, tiedown fees etc while the resident of the airpark pay nothing and just go onto the airport for free. Airport businesses (FBO flight school avionics shop etc) on the airport proper must have certain non discriminitory rules and have to have bathrooms etc. This all costs money to invest. While some guy in the back of his trunk could start to use the through the fence area to run his flight school. It is an unfair business practice.
Basically through the fence operations amount to essentially trespassing. It is no different than your neighbor coming into your back yard and using your pool for free after having none of the cost of investment or maintainence etc.
Many through the fence operations can be worked out if they pay airport access fees etc equivilent of what any other person etc would have to pay to base themselves on the airport. Also there also has to be some understanindg about operations expecially if it is a through the fence operation at a controlled towered airport.
This is no different at a true outright residential airpark. I currently live on an airpark. I however an NOT an owner of the airpark itself. I must pay for the use of the runway. We call them airport access fees. That is because while I can just go to my hangar and taxi out and take off. I am using the airpark land. So I pay them for t his aspect. If I become one of the owners of the LLC that owns the airpark, I then do not have to pay this access fee.
Why should the public airport be any different?
The only other time the FAA cares about a separate individual airpark is when the two airports are so close that there are traffic patter issues that everyone can agree can be a safety concern.