You can now use two types of spoilers: [ spoiler ] secret [ /spoiler ] or [ spoiler=teaser ] secret [ /spoiler ] - without the spaces - results below:
Click to see spoiler(s)
I'd like to see the spoiler tag be a bit more obvious. It's easy to miss if there isn't much text. I initially didn't notice the spoilers in the "Guess that movie." thread and assumed we were meant to post answers. Had there not been multiple films and other replies which didn't post the answers, I probably would have thought the "1:" label was just something random in the signature (like an old school emoji).
Other sites typically had more obvious labels, such as "[spoiler]" in bold or red.