For me, writing a post that tells the whole story from beginning to end, often in great detail, is pointless and only ruins the experience for users looking for information and opinions to decide whether to watch a movie or series.
This practice of spoiling an entire film will only drive away potential readers and followers.
That's why I only read a select group of authors here, including you, because I know I'll find an opinion, review, etc., without revealing the plot. Nameless, danielcarrera, and javislava are other favorite authors who I know won't ruin the viewer's experience with spoilers. And if it's necessary to reveal something, announce it with eye-catching text or hide it using the spoiler option on the homepage, just as you said.
That's why I'm very careful about what I read, because there are many movies I haven't seen, and I don't want the whole story told to me from beginning to end. It's a bad practice, and many people do it unintentionally. I leave comments for some people suggesting they don't reveal anything, because that way they won't gain new readers; on the contrary, they'll scare them away when they see one of their posts.
I remember when I posted about Mike Flanagan's miniseries, "Midnight Mass," my post didn't contain anything important or any plot twists that would reveal the story's surprise, and luckily I'd already seen it by the time I came across several posts that even revealed the surprise of episode 3, which is the title of the post. It was a shame, because that would ruin the experience for someone who hadn't seen it.
As you say, it's a matter of consideration, of common sense, of thinking about those who haven't seen it and being more careful, focusing more on your own opinion about the story without revealing anything important; even so, it generates more intrigue, and the reader might become interested in watching the movie or the series.
RE: The curse of spoilers.