In order to prevent people from inadvertently ruining a good movie, book, or TV show for others I've installed a new forum plugin that let's you mask spoilers. To use it, just surround the text that your want to mask with the following tags:
[spoiler]Hidden text goes here[/spoiler]
If you are using the full editor (rather than the "Quick Reply" box) you can highlight the text and then click this button:
This is what the hidden text will look like. Just hover your mouse over it to read what it says:
[spoiler]Spoiler alert: the Apollo Moon landings really did happen![/spoiler]
I hope people will use this. I don't want to prevent people from discussing movies, but I know how much it sucks to accidentally hear details about a movie before you get to see it for yourself. I had to avoid the internet for a day or two when Breaking Bad ended last week because I couldn't watch it when it aired.