What about airfields with noise-abatement procedures?
Comes down to proper pre-flight planning. Our airfield has lots of noise abaitment issues but it is explained on their website and Pooleys etc...Of course if I came across an airfield that I didn't understand the procedures then I'd call them to clarify. PPR not required by phone where I fly from.
One other issue is to do with fire rescue and whether your aeroplane has a BRS fitted apparently...at least that is what a lot of people have asked me when I have called for PPR.
Mind you these days, I'd do like Damyns Hall and have an online PPR form which I can fill out when checking my Notams which prints directly to the 'tower'.