We now have a spoiler tag; use it whenever you're posting something with a small amount of spoiler content on a non-spoiler board, or if you're posting an "off-topic spoiler" for a particular spoiler board (for example, if you talk book spoilers on the TV show spoiler board, the book stuff should be inside a spoiler tag).
Spoiler tags when used properly will look like this:
Oh my goodness! Something spoilerish!
It may also be a good idea to state what the spoiler is from, so the audience knows whether they can proceed or not.
To activate the code, use the radiation symbol in the posting toolbar, or use the tags SPOILER & /SPOILER inside square brackets [].
Please make sure to "preview" your posts and make sure that the spoiler tag is working correctly.
It breaks down to this:
ON-TOPIC SPOILERS ON A SPOILER BOARD: Do not need the tag.
OFF-TOPIC SPOILERS ON A SPOILER BOARD (e.g., book spoilers in a TV spoiler forum): Need the tag.