Then there's the Animal Crossing Nook Miles Ticket issue of determining what is new? How long would we need to use spoilers? When exactly does new content prevent being'fresh' and for that? Using the southern hemisphere again a good example, snow by mid-July was not new for us.
Perhaps spoiler tags ought to be encouraged, but I don't think they should be a mandatory rule.
I would just like to say that I like memorial posts. I like making a safe space for individuals to discuss their heart and grief with us. I believe that for someone who doesn't know the rules to log on and be exposed to then get their post taken down or not accepted would result in further isolation and harm.
Should you need to change anything, maybe you could add flair to memorial posts to serve as a cause warning to people who've unhealed hurt and prefer to skip past those posts.
I truly don't believe the answer is to remove them completely. People come from a really vulnerable area submitting those and are attempting to provide their heart to a safe community they expect will accept it. I think that cheap Animal Crossing New Horizons Items could be really detrimental to get an automated delete in return.