A spoiler by any other name will still be...a spoiler?

No.11230226 ViewReplyOriginalReport
I was always curious to what a/ considers needs to be tagged as a spoiler?

Is it a free game where nothing is safe? As long as the anime airs is it free game then? What about if it's a manga/video game/VN first with the show still airing? I was wondering since there's no section for manga(well /co/ technically) and VNs.

So what is a/'s stance on this?