One of your more interesting threads, Barney. It raises fundamental questions about good manners as a guest while also raising issues regarding our ability to discuss courses on this site. Ordinarily, the rule that as an invited guest, one should not speak ill of one's host or anything he holds dear is a good one absent special circumstances. However that would mean that the only analysis, other than fawning positive critiques, would come from members, professional critics or raters. Otherwise only public courses could be discussed. Perhaps that is why in the early days of this site, most used assumed names so they could be free to violate standards of decency without being held accountable. I am not sure I liked the results of that ethic. For some, such as myself who hold positions in golf associations, we have additional constraints
So what do we do unless we want to limit our discussion to public courses, theoretical problems or arguments with raters? I am not sure I have the answer, particularly since I confess to enjoying theoretical problems. But I suppose it starts with the recognition that as guests we owe our hosts courtesy and that if we plan to post we should say so. Second, if we do post, we should be honest but polite and, absent some special qualifications, we should make it clear that our opinions are our own and we should try to explain our opinions. Thus to say that the 16th hole at a course is "horrible' is merely insulting and really tells the reader nothing. To suggest that it is overly narrow and that the green is shaped poorly given the likely angle of approach, gives the reader and club member something to consider and identifies the author's prejudices. Thus even the club member can evalute the criticism.
As far as the types of "secrets" that are best classifed as rumor-mongering", I suggest that those have no place on this site.
The difficult balance is trying to engage in frank, honest and open discussion about a topic we enjoy while maintaining our status as decent and considerate guests. Having hosted Barney, I know that he appreciates his status as a guest and I appreciate the thread as an effort to deal with a sensitive problem.