Lets say I am the prototypical sociopathic bad client (I am not BTW). Assume I want to gather information on a specific SP. Do I need to wait for a review? No, if I am a true sociopath and am patient and (on the surface) charming enough, an investment of $250 - $500 will probably get me an appointment with that SP. At that point I would have access to whatever info a reviewer might post (location for incalls, tatoos, and whatever info the SP chooses to share with a client). I know you and others screen your clients but lets not pretend that a true sociopath, committed to getting close to you could not. I am not trying to be a fear mongerer here, my point is simply that a suggestion that such a list would protect you from having your personal info fall into the wrong hands doesn't really hold water. The very nature of your profession exposes you to this risk...it is a risk you have chosen to take (please do not misinterpret me - no one accepts the risk of violence or anything of that nature - I simply meant that when you post a website and work as an SP you accept that there is some degree of risk a person you would rather not know might stumble across that info).
Clients do not choose to take that risk. If someone wanted to gather info on myself or another poster what steps would they have to take? I don't deny that someone who is decent with a computer and half way observant could probably compile a pretty good idea of where some of us live, what we might do for a living, etc.. Nevertheless we, by choice, keep our identities and personal information farther from the public domain than you do. For you to arbitrarily put that information on a list in cyberspace seems to violate what I bet most clients assume is an implied promise of confidentiality.
My point, made none to concisely, is that if a reviewer posts a malicious review, or posts personal info about an SP, he has absolutely violated a confidence and is out of bounds. I hope that Fred and the other moderators stay on top of things enough to protect SPs from these types of violations. Nonetheless, even if such a review is posted, the potential damage to an SP's privacy is far less than the damage that could be done to a client if his information was inappropriately made public. For better or worse, your information is somewhat attainable - it is not a nice thought, but it is a fact. A client's info is far less attainable and most of us want it to stay that way.