I agree, the only thing I use Facebook for these days is 2 private groups on specific subjects. While they're incredibly good for the kind of support group styl

I agree, the only thing I use Facebook for these days is 2 private groups on specific subjects. While they're incredibly good for the kind of support group style 'ask a specific question, get a quick answer' type of thing, they definitely suffer from the problems in the article - mostly people getting very defensive and combative when their comments are questioned or criticised. That may be a characteristic of the type of group I'm in though.