In any situation leading to litigation, and from my non-lawyer perspective, there are two things one must ascertain: 1.) is the law favorable to my defense, and 2.) do I have a good set of facts?
So, the first service of such an organization would be to provide a library of the characteristics of the laws in every state (starting with key states and building from there) so that reviewers could know their rights and responsibilities.
The second service is that initial consultation to determine whether one has a good set of facts for defending against a threat. This would help address the need for a local lawyer licensed in the state in question if a case actually goes to court. If a reviewer doesn't have a good set of facts for whatever reason, they can strategically retreat before things get out of hand.
This might lead to a third tier of service, which may be standardized response letters that are vetted for (or general to) every state, and available to members. The response letters would apply when a reviewer is challenged directly by the manufacturer, as was the case this week. Until there is a lawsuit, there is no requirement for a legal response--so this first response, if provided at all, should probably just claim rights appropriately without undermining good faith or a future defense.
The next level is a letter from from the manufacturer's lawyers. This is to me on the bubble of what standard response letters could cover--help from lawyers needed on how to efficiently respond to a "lawyer letter." Most lawyer letters I've seen are mere threats or fishing attempts, and the result of, "I want you to sue X!" "Well, Mr. Y, I don't think you have a case against Mr. X, but I could write a letter if you like just to see if he'll back off."
The first communication that actually demands a response to avoid a judgment is a lawsuit, which must be formally served. That's when the consultation will pretty immediately lead to finding a lawyer with jurisdiction in the state in question. Members would be advised to never respond to a lawsuit themselves--use a lawyer. At least in a lawsuit the plaintiff has to make their case well enough for the defendant to be able to respond in good faith. Three weeks seems to be the usual allowed response period.
The notion of setting review standards (beyond ethical standards) would be the intent to always have a good set of facts, but I think it would be too restrictive in practice and would homogenize review approaches too much. The whole point is for reviewers to be free to act in good faith, not to follow some prescription that would make their reviews like everyone else's. But there may be some standard language that would help them avoid undermining their position inadvertently.
I believe that individuals reporting their personal experiences with a product they possess is already pretty well protected in law. It's the "professional" reviewers--reviewers who have some visible claim to expertise sufficient to make their reviews authoritative--that have greater exposure.
Rick "just some suggestions for structure" Denney