If that had been all you had written I would indeed have had no problem with it. I would point out that you do not need to visit these groups to investigate whether this is can be the case or not. Would you not be interested in finding that out? As for the JREF thing, well if you read and understand my original post it would be clear that this is not something that someone else can just tell them not to do. (To clear it up, I was not susceptible to this as I had joined out of scientific interest rather than anything else. My friends who had joined for other trauma related issues were). It is a psychological tendency, and one which is co-exploited within groups.
And the false dichotomy thing is a cop-out i'm afraid ;P