I edited the CSS to include the option to use spoiler tags, like TvTropes uses. The spoiler part will be hidden by default - you have to highlight the text with your mouse to see it. To use them, simply make the text you want to be hidden be a link, but have the link URL be #s. So,
This is a [spoiler](#s). creates:
This is a spoiler.
Let me know if there are any bugs.