Or the opposite. Now that I have the app, I realize that just about every single place I've flown in South Florida is not allowed. Basically, to find an acceptable place to fly I'd have to drive west until I hit the everglades, then keep going to the middle of nowhere.
Personally, I think the 5 mile rule about airports and heliports is a bit overkill. 2 miles would be more then sufficient. When you take into account that just about every hospital or police station has some kind of registered heliport (whether they use it or not), that leaves just about nowhere that you're allowed to fly.