When you post a message for the sake of bumping a thread only, please just write “bump”. Not “bumping”, “bumpity bump”, “Trump sucks”, whatever. So that I can easily cleanup the database of those junk posts every once in a while with a simple scan.
Old threads no longer self-destruct in any case other than deliberate deletion by author or moderator. Everything is kept, nothing is lost. Eventually old threads will be automatically marked archive and reside in separate board archives.