This hasn’t come up yet, because I haven’t posted any spoilers, but it WILL happen! And I want to make sure it is APPROPRIATELY HIDDEN for you guys.
For a very short spoiler, I will simply black it out, like so, and you will have to highlight over it. This low tech method will black out the offending spoiler, and it will also be blacked out in mobile theme and in feeds. (A “reveal spoiler” button will not really do much in a feed or mobile theme.)
For a long spoiler, I will put SPOILER in the title, followed by a warning at the start of the article…
On the SITE, I will simply cut off the article so it only displays the SPOILER WARNING portion of the article on the front page of the blog, and you can choose whether to click through or not.
For a long spoiler in the FEED, that is what I need help on.
Option 1: I truncate the feed for spoiler articles only. It will be a pain in the ass to click through if you are behind a firewall, but there is little danger of accidentally seeing something you don’t want to.
Option 2: I don’t truncate the feed for spoiler articles, since truncated feeds are annoying. I will put up “SPOILER” in the title and a big SPOILER WARNING at the beginning of the article, but you will be responsible for averting your eyes and moving on to the next article in your feed reader.
There’s a poll embedded here, so you will have to click through (yuck). HALP.
Edit: If you are interested in what I consider a SPOILER, see the Spoiler Policy, under construction. TL;DR a spoiler is a revelation about the story, not about mechanics.