Hey, just dropping in to say that spoiler rules should be set and agreed upon by the community. These could be placed in the opening post for reference. When it comes to older titles like Persona 3, some might make the assumption that the Persona thread is a safe place to discuss the game without reservation (I know I would), so I wouldn't get too bent out of shape if somebody inadvertently posts a 'spoiler', especially if it's something pretty minor. I'm not sure about statute of limitations, but personally, there should be some level of leniency if a game is ten years old.
There should also be some common sense too of course. If someone in the community is currently playing Persona 3, you shouldn't go out of your way to spoil the more significant story beats for them regardless of whatever the thread rules are. Be considerate.
I remember a while back the title of this community asked for marked Persona Q and Utlimax spoilers, did that work well enough for the newer games?
That AVClub piece is interesting enough I think, but probably should be nice and mark it anyway.
And don't do this, it's always to get you banned if we see it, sorry.