Very cool, if true

Heh, DW is actually considering having a separate Spoiler tag that'd work similar to what LJ has done, it does display on entry pages as well, there's a lot of reasons to have them separate.

However, DW would make sure that a) it's obvious what's happened and that b) there's a 'close' option as well.

I really don't like the LJ implementation and the non obvious JS replacement it does, first time I saw one I clicked it and didn't see any change to the page, had to scroll and then it twigged what had happened. DWs might look a bit strange at times but at least it's obvious what's happened.