How to disable listhelper for a gnu.org mailing list?

[John W. Eaton]

On January 24, 2014 I asked the following question on this list:

  I have the following lists associated with bug, patch, and task
  trackers on savannah:

    address@hidden
    address@hidden
    address@hidden

  I'm the only admin/moderator for these lists but I've noticed that
  messages are being approved without any action from me.

  That would be great for some lists, but for these tracker lists I
  never want people to post to these lists directly because when they
  do that, their comments aren't saved in the tracker and the tracker
  lacks possibly important information that people will not be able to
  find later when trying to follow up on old items.

  When I first noticed this behavior, I discovered that
  address@hidden had been added as a moderator for the lists and
  removed it to disable the service for these lists.  That seemed to do
  the trick, but now messages are being approved without my action
  again.

  How can I find out how this is happening?  Is listhelper somehow
  enabled for these lists even though the listhelper address is not
  listed as a moderator address?

and Karl Berry responded

  Hi John - sorry for the surprising and undesired behavior.

  Spam autoremoval and real-msg-approval are two (mostly) independent
  things.  The way to achieve the latter is by writing us, which you've
  now done .  So we won't approve anything on octave-*-tracker in the
  future.

  The effect of removing address@hidden as a moderator is to make it
  so you have to delete all spam manually.  If you wish, that can be
  (re)enabled without implying anything about approvals.  (Several
  lists do that.)

Until recently that worked and I didn't see any messages that were sent 
directly to the list being approved automatically.  But now I it seems 
to be happening again.  Did something change?

Thanks,

jwe