You hit the nail on the head. It is to keep troublemakers out,
and people who have NFI. It is also an environment where
speculation is kept to a minimum, and hence, the members there are
also highly trusted. If anyone from SINbus or SGforums was to be in
that forum, and any sensitive information was to come out, then
speculation will begin, and you have threads like we have here on
the B9TL. It may be extreme, but I suppose it has to be done.