Huhu,
I know its been suggested, and also rejected earlier, but that was a while ago..
Also, I even know that there is an other topic, but hey: more propositions / ideas, and eventually one will fit

I was thinking about something like:
The devil is in the Details:If someone logged in with a "staff account", it would just show the spoiler tag's content anyway
- it would follow the site's overall, static'ish & clean layout
- no extra work to the moderators by opening down a [+] [-] panel all the time
- only pure text would be allowed, perhaps even limited to a specific length, like 200 chars (with a total of 3 lines? more empty space could be annoying)
- quote? not sure about that, but it wouldn't be a problem I think if it wouldn't quote that part
- I can't come up with other limitation's right know, would have to test it first
Summarizing: with the right rules, like I suggested some to start with (and which is Paul really good at, making the right ones), I hardly believe it could be abused
Why? Where?Recently, I find myself in a situtation daily (actually usually more than once), where I would like to use this feature on the International Forums (or Other Languages)
- movie topics
- tv series topics (there is a specific game of thrones topic, a big problem also ^^)
- more uncommon things, like we like to watch LOL or DOTA games and discuss it (even at live), but obviously not everyone able to watch it at the same time; still, they check the topics to regular in-game stuff
- [couple of other cases..]
PS:
[spoiler]Dumbledore dies

[spoiler]