I sure understand professionals' concerns about the validity of information provided in peer health support groups, but it's important to understand that they meet anyway, with or without our support and listing. It's caveat emptor, as it is everywhere else - on the Web, in the media, it's all about questioning and evaluating health information.
It may be surprising, but from my own observations of people in health support groups, the discussion does get round to whether information is valid or not, surprisingly often. I think we all are coming to realize that the goal has to be empowerment, so that the individual can be a true partner in his or her health care - informed, skeptical, involved, well-supported within the health care and personal communities.