The board I am a member of is pretty quiet and most of the threads come from its creator. I think she pulled from a pretty small pool though and it is a board based on a pretty specific category of WebMD members.
We have not had one single incident of Anon postings or things getting out of hand on that board since it was created. The thing you have to worry about though if you have some hard-core trolls stalking you that are determined to cause trouble is that they can always get a new username to gain access to a private board too. Understandably it will probably happen a lot less often than trolling on a public board but it is still possible.
That would also be a question for WebMD administration about being permitted to remove invited members who are causing problems (although I don't know how you would go about this with Anon postings).
I think I would recommend a private board, especially considering the problems that have been touched on here from other boards and that I have seen glimpses of around here but whoever chooses who will be invited will have to beware of trolls, especially with members who just recently joined.
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
The opinions expressed in WebMD Communities are solely those of the User, who may or may not have medical or scientific training. These opinions do not represent the opinions of WebMD. Communities are not reviewed by a WebMD physician or any member of the WebMD editorial staff for accuracy, balance, objectivity, or any other reason except for compliance with our Terms and Conditions. Some of these opinions may contain information about treatments or uses of drug products that have not been approved by the U.S. Food and Drug Administration. WebMD does not endorse any specific product, service or treatment.
Do not consider Communities as medical advice. Never delay or disregard seeking professional medical advice from your doctor or other qualified healthcare provider because of something you have read on WebMD. You should always speak with your doctor before you start, stop, or change any prescribed part of your care plan or treatment. WebMD understands that reading individual, real-life experiences can be a helpful resource, but it is never a substitute for professional medical advice, diagnosis, or treatment from a qualified health care provider. If you think you may have a medical emergency, call your doctor or dial 911 immediately.