We've had previous discussions about spoilers. We have the rudiments of a policy, and we're trying to stamp down on spoiler tags. Saying “spoiler” in a question title is meaningless because there's no context to say what it's spoiling. In fact, the very use of spoilers in a question is dubious: someone who doesn't want to risk spoilers isn't going to browse the question at all, so why hide anything?
I do think spoiler markup is useful in answers, because the audience is clear: someone who has read/seen about as much as the asker. So, in an answer:
- If the asker knows, say it openly.
- If that's what the asker is asking about, say it openly.
- If it's secondary to the answer, so that the answer is improved by the presence of some extra information but makes sense without it, then use spoiler markup.
Should we ask for a ban of spoiler markup in questions? Or only strongly discourage it?