The BBC asked the internet to play along and not spoil next week's Doctor Who season finale.
Of course, somebody on the internet decided to spite that.
At the time of me publishing this, the Wikipedia page for Doctor Who has been hacked and is nothing but a spoiler in big white letters on a black background. It seems that the GNAA are the culprits.
You almost certainly don't want to visit the page. The spoilers are just thrown up there, aren't very evocatively written and don't come across too well. These details are certainly going to play better in context.
And… it's probably good for me to flag this up, as more folk are likely to visit the page by mistake than when actually looking for spoilers, right…? So spread the word. Warn fans to not go near Wikipedia for a while.
UPDATE: The page is mainly back to normal now, but I'd be cautious. I did screen cap what was there, but I'm reluctant to share it.