There are a lot of people that suffer from health-related obsessive compulsive disorder (i.e. hypochondria). I imagine a site like this would be the worst possible thing for such a person.
That said I agree that there is a potential problem, and there ought to be a good resource that gives you a good sense of what is a "reasonable" amount of worry. I'm not sure how that could be structured though, especially with the potential legal issues.
We consider it up to our Medical Detectives to determine whether the patient's symptoms are physical or psychological in origin. If the latter, then 'somatization disorder' or 'hypochondriasis' are perfectly acceptable diagnostic suggestions.
That said, a lot of patients are given psychological diagnoses from physicians (i.e., "it's all in your head") only to discover on our site a physical root cause to their symptoms.
I was thinking of starting an educational institution, and a hospital that would teach and have doctors who can troubleshoot. But I don't have the time, connections, or money to do something like that. It seems like you're taking a different approach, a much better approach. I hope this isn't a money grab, and I hope you change the world.
-- no single diagnosis is more than 2% of the total, except for one (Lyme disease at 2.3%) -- 95% of these have come up as final diagnoses only once or twice in the history of the site
So it's fair to say that it's a VERY long-tail list. Also:
-- our current success rate is 70% (i.e., the patient told us that we brought them closer to a correct diagnosis or cure) -- about 50% of our final diagnoses are medically confirmed by the patient's doctor
These statistics are based on our post-case surveys, which not all of our patients answer, but they should be directionally accurate.