If the pilot feels him/herself in a situation such that declaring a pan or emergency is thier best action, would not the landing fee be a very minor consideration,
Yes, I would also have thought so, although the "majors" may well make some think twice (Gatwick could end up costing well over £700 for a short stay). ALbeit I dont think Gatwick actually are members of the scheme but they do waive the fees in cases of a genuine emergency all credit to them.
I think it is "still" a nice touch however; maybe a little like a resteraunt being a little slow and offering not to charge for a bottle of wine, we could afford the wine, and might well not be too bothered about the speed of the meal, but the gesture is never the less appreciated.