If there is a hazard then the airport operator may have a responsibility (and liability) if a pilot has an accident.
Only if the flight was being conducted in accordance with normal practices, and something happened where the airport was at fault.
For example you do not notam there is a hill nearby. Nor do you need to tell pilots about it in advance.
A PPR phone call could be useful for asking questions like 'are there potholes'? Of course the answer will always be NO. But there often are, and prop strikes are common. Airfields are very well practiced at washing their hands of liability for prop strikes. They are not liable if the pilot was normally competent yet pranged it, but they are liable for a pothole induced strike. PPR is useless for that.
There is no possible reason for PPR
by phone. It is just obstinate self importance, and easily defeated with a satphone, or by making a GSM call while flying low
I find PPR especially irritating because, in the European context, a lot of airports want it but many of them (international ones) do not communicate in English.