Is there a way the site admins can lock or auto expire threads and discussions so that users cannot repost to them? We have questions two or more years old that random users will post to causing the original thread to lose relevancy. It would be good to see this in an on-going basis, e.g. if a thread has not been updated in one month, then auto expire it, causing it to become read only. That would greatly improve the utility of this forum.