To you and I 'an established strip' is fairly obvious. To Joe Public it simply isn't. That is the point we have to understand.
That big strip of mown grass, the windsock, the hangar - they don't mean anything to the average dog walker. In most cases they will not have seen an aircraft on the strip, if they have seen an aircraft in the vicinity they will not have linked it to that long strip of mown grass - aircraft do not land in fields is the usual response.
I've operated several strips and it frustrates me that pilots can be so stupid and arrogant when it comes to not seeing the viewpoint of the 'general public'. If you talk to them they are ALL surprised that it is possible to land in a field, legal to land in a field and that the police do not stop us landing in fields, thta we do not need permission from 'air traffic control' to land in fields.
That is why so many strips have all sorts of restrictions, why PPR is so necessary. The trouble that the original poster - and many others in this thread - can cause the strip operator is almost limitless.
That is why at my last strip we would only accept visits from people we knew well and why many of those we knew and all we did not, were simply not allowed.