I'm on it. My location is listed in the wrong state. They also have the wrong specialty listed. I have no patient comments. I could not care less.
It is private, so there are no consequences except that people reading it may get incorrect information.
I would never bother correcting anything on it unless (1) it was defamatory-type information such as claiming I had malpractice claims when I don't, or (2) I were going into private practice and had a financial interest in my public perception.
However, take breeze through the internet sometime. There are a lot of these sites. And interestingly in my case, all of them repeat the same incorrect information, which suggests to me that they are feeding off each other. It is also interesting to me that my correct info (practice address, specialty, etc) are all publicly available on my state medical board's website. And yet they post incorrect information.