Monocock,
If that were the case it would be simple, and I think in the case of private strips it probably is the case. But what about the airfields that are actually quite happy for anyone to turn up, but are still listed as PPR? englishal put it better than I did:
If an airfield doesn't really give two hoots about your details, then why list as PPR, just give the opening times
If you knew PPR meant PPR, rather than knowing it could mean...just about anything really, I for one would find it easier. And if conversations around flying clubs are anything to go by, I'm not unique. People ignore PPR, because they know that a lot of the time it's not actually required. Crying wolf?