If a thread is over 1 year old it should be auto-closed to encourage people to start new threads. This avoids comments or resurrection of very old discussions.
The moderators and administrators have discussed this matter in the private moderator's forum a little over two years ago. Our administrators have looked into it and there is no automatic way to close threads. We deal case by case with resurrected old threads.
JD Lessley Have you tried finding your answer on the ChurchofJesusChrist.org Help Center?