For SEO purposes, I do not want to duplicate a page of content. However, since I use a bridge from WordPress to XF, I could rewrite that plugin to automatically insert the [ Spoiler ] tags before posting to the forum. The only reason is to make it a little more convenient for forum members to read an entire article, vs. hopping to our main site then back to the forum to comment.
If the text inside the spoiler does show up, then I may use some alternate method. I'm just curious what happens with the text.