I fly from Panshangar and, although I have heard mixed comments about their friendliness to visiting aircraft so can't comment on their attitude towards spotters, I can say that they have an awful lot of trouble with "tresspassers". It's very close to open fields and people frequently walk their dogs within the aerodrome boundaries. The best one I witnessed was mopeds on the runway!! It was after dark, but does give you an idea of what they're up against. However, being rude to people who are respecting aerodrome rules and doing things properly by asking permission doesn't really help anyone.