I agree with this regulation at large - or let's say very busy airports. We are class G airspace, no tower and just a flew planes fly here on a nice day.
We don't bother anybody, but a recent expansion brought up some concerns form the FAA. They would love to put a large fence around any airport and
don't let anybody enter the area.
But then the costs would be very high and being a public airport (which to great parts financed by the city, aka taxpayer), they need to play nice.
We don't want to cause any trouble, we do have some great supporters in the airport commission and be happy to use an unused taxi way for our runway.
So it would be nice (and logical) to get marked on the charts or at least a remark in the a/p information.
Anything and anybody can be a hazard if intended to be...