There are a number of these airfields that are privately owned, and which are currently listed as PPR.
In speaking with some of those airfield owners, they don’t want their details listed anywhere because they have had an increase in pilots landing without permission, because the pilot has always wanted to go there, but either doesn’t want to pay landing fees or can’t be arsed going through the rigmarole of ringing up or submitting the paperwork to get permission.
In one case that I know of, old mate pilot turned up to a privately owned airstrip without permission, rolled out his swag under the wing, then tried to help himself to avgas and oil from the scenic flight operator. Did I mention this was a Station that offered accommodation (from tent sites through to four star) for travellers, and that the airstrip was leased to a licensed air charter operator who had the avgas for their company’s use? Some clown coming through on the wrong frequency, flying backwards against circuit direction, and then trying to “borrow” avgas didn’t impress them much - all could have been solved with a quick phone Call to get permission, check the frequency and circuit direction.
Or the hero who turns up and lands, without permission, and admits he thought he was at an airstrip 20nm away. Both airstrips required permission to land, the one he was aiming for never gives out permission to land but he didn’t have permission from either. And admitted it was because he couldn’t be bothered. Bragged about how he was a check & training captain for (insert international airline here).