David,
Flight cancelled, back at house, due to weather, so:
Of course we have an interest and we do take it seriously. That is why we have a membership process that checks out scruples as best we can.
If purported ethical breaches occur, there is a complaint process, which has been used a few dozen times that I know of over my 33 years as member. I am not sure if they are all publicized widely, so I don't know the true numbers extent. As in Joel's examples, after a hearing, there is usually resolution short of expelling a member, but it is a possibility. It is often a misunderstanding. I will agree with Mike Young that once in, members probably get more benefit of the doubt than applicants during the membership process.
While that may sound a bit unfair, it really is human nature to do that with someone you know well, vs. a stranger. And, while we can all cite examples of less than choir boy behavior, to suggest that is the norm is way out of the realm of reality. As stated, I believe 99% of our members projects are handled well, by any due care type of legal or general professional standard.
So, I don't think your example correlates to what Joel is suggesting. First, I wouldn't, and I doubt anyone would represent themselves as a Ross expert (or that in the information age, they could without being found out) If someone did lie about their resume, yes, it would probably be a violation of the code of ethics if another architect brought a claim. You may have no idea how small and connected the golf profession (compared to the legal profession or others) really is. There are only a few bad apples, and I think everyone is pretty aware of who they are!
But, those kinds of complaints, rumors, what not have been extremely rare, so we shouldn't over play them. Further, no one has said that any architect has actually misrepresented credentials on this thread, so your example is getting pretty far afield. Joel seems to be suggesting that a particular design has come out unsatisfactorily in his eyes, and thus "something should be done" apparently by ASGCA. I have explained why it hasn't, basically explaining that he is attributing far too much power and responsibility to us.
Besides, while ASGCA has its missions, which don't always align with historic preservation perfectly, single purpose historic societies have formed and beat the drum, architects have specialized in it, researchers and consultants like Brad Klein and Phil Young have become active where asked, etc., to fill the void. Whether any of these should have a say in the affairs of a private club if not retained as a consultant is sort of an open question, mirroring the whole political process/balance of "public good vs. private rights".
I have already explained the problematic mechanics of testing ASGCA members to determine their continued ability to provide "quality design." As mentioned, I doubt AIA and others are asked to do the same anyway. While there have been some unfortunate mismatches of architects and projects from time to time, in reality those, too, are rare. I believe the problem is being overstated, to say the least.