Suggestion is plain and simple. If a plugin is older than a certain amount of time (set all groups with permissions to change it) then a small warning will appear. Players have to click on a check box in order to reply. Screenshot elaborates on this. Link to add-on: https://xenforo.com/community/resources/tpu-show-warning-when-bumping-old-threads.3913/ Download will become available after you log in. Default settings should be changed to your likings before using it.
Support, there would be less people who would post and then get punished and then claim to the Moderator "I didn't know!". This can also serve as a gentle reminder for all.
Ok let me explain this in the simplest way possible. It warns you that you are about to gravedig a thread, before you post. That way, you don't gravedig a thread accidentally. You can still post it tho by ticking the box. -=- support