<<So get used to being asked by people in authority what you are doing and if you answer back politely you will get treated the same in return. >>
My wife and I were extremely polite to the Police Officer who questioned us about looking at aircraft at an airport from a public road and he was polite too. It transpired that he knew an acquaintance of ours who was also a Police Officer and we chatted amiably for a good while. However, it didn't stop him from searching our car and issuing us with a notice stating that we had been searched. We wonder if that is on our "record" and whether it would raise any problems if we ever went into the USA?
He also told us that it was easier for him to achieve his "targets" by questioning the spotters rather than becoming involved in problems at a nearby shopping mall.