j08 You do seem awfully proprietorial about Gransnet and the forums. Members are allowed to post things of which you disapprove and with which you disagree. You, of course, have control over your own posts and can easily avoid making insensitive and unkind remarks in response to those describing their problems and unhappiness, if you so wish, without confining occasional posters to a virtual ghetto.
Have you tried net grans or whatever it's called where there is a hierarchy of posters as you seem to be suggesting? Perhaps you would be happier there.