Except there are lots of airports that don't have gates or fences or
anything. They still are shy about coming on the property. Why?

For the same reason I don't walk onto someone elses property, I wasn't
invited.

Let's invite them. Specifcally targeting the younger crowd. An Open
House at the nation's airports, advertising fly-in's to more than just
other pilots, etc.

It may already be like this in other areas of the country. Just not in
mine.