"George Patterson"
Some. There are no rules for scanning people loading and departing from
private strips, and few (if any) rules at what we call uncontrolled
airports. But you can't land a light plane at a commercial airport and
just taxi up where the commercial planes are.

I have. A few years ago I pulled up beside a 767 and picked up one of the
crew. I did get permission from the operator though.

moo