Idiotic question from non IR rated forumite:
IO, could one not "design" ones own GPS approach for an airport? I mean, all one needs to do is go there in fair weather, establish parameters for a descent without bumping into stuff and then sell it/give it other pilots? Be your own little one man Jeppesen?
Sure, it would be illegal to fly it, but how exactly would they know that you did fly it without sitting next to you?