This suggestion is fairly simple and self-explanatory, basically, just delete any replies that are considered necroposting and warn the user in a private conversation. Every day multiple threads get necro posted on and get bumped to the latest posts section as well as go to the top of their sub forum's list because of that. After that initial unnecessary bump, a staff member usually replies again, locking the thread due to necroposting (another unnecessary bump). Deleting the reply will get rid of the bump and fix this issue completely and messaging the user privately will likely make the chances of them seeing the warning higher as they'll be notified that they have a new message. lmk what you think :)