These sites, such as RateMDs, Vimo, and RevolutionHealth, offer patients an opportunity to rate physicians on their helpfulness, knowledge base, interpersonal skills, and punctuality. This has become a popular online activity, with hundreds of physician reviews appearing daily. Proponents of such sites view them as a form of customer feedback and see patients as consumers who have a right to express their opinions about services they pay for. Critics find the sites defamatory and fundamentally flawed. How can one be sure the person posting a review is really a patient and not someone with a grudge against the physician? If a physician disagrees with a particular comment, there is no opportunity for rebuttal: physicians are bound by privacy laws and a duty to preserve the confidentiality of patient information. Also, most rated physicians average a handful of ratings, which can hardly reflect the full range of impressions of a physician who sees hundreds of patients each year.1-4