I went back and took another look at that thread, and I really don't see how Robin was, in any way, "run off."
Clearly he (or she?) is an articulate individual who knows a lot about the disease and Active Surveillance, but I still agree with Davidg that refusing to post even the slightest information about oneself (especially after being courteously asked to do so several times) displays a lack of respect and understanding toward those who are participating in a discussion.
No one was asking for Robin's identity, or anything close to that...just a comment in the way of introduction and background of a most general nature (though a "signature" is always a most welcome addition at the end of a comment). If not a beneficial feature, why even have the "signature" portion of the forum?
In that thread I said, " When anyone starts talking to me about prostate cancer and its treatments with an air of authority, I naturally want to know if they have personal experience with the disease, if they're a medical professional, if they're a brother, wife, or close relative of someone who had or had the disease, if they're a young man or someone late in life. All these things affect the way we look at life and at a cancer diagnosis." I still feel the same way.
If I migrated over to one of the other forums here on HW and started participating in a thread as if I had some expertise on the subject matter, I would certainly feel obligated to provide some minimal information about myself. And, certainly, if someone specifically asked me if I would introduce myself by explaining my relationship to the disease (let's say Crohn's, for example), why on earth would I refuse to do so.
If I walked into a bar and found myself drawn into a conversation about colon cancer, I'm pretty sure I would not hesitate to mention that my father died of the disease.
I truly hope Robin will continue to post here, but I also truly hope that he (or she) will post a signature or some basic information to help provide a context for his or her comments.
Peter, you apparently were made aware of Robin's bona fides. I don't think anyone was asking for a curriculum vitae, just a bit of background for perspective. And, once again, I'll include my signature at the end of this comment.