Major update.

the old-school reputation system, where you could give +/– ratings to posts

I don't quite understand this point. What's the difference from the current reputation system? Or are we talking about displaying information about the number of upvotes and downvotes for each post?

I've been asking for a spoiler feature for a long time, but it never happened.

Well, now, thanks to Shaman, the code is already available.