The thing is, if you go to the homepage of the site there's a list of the last ten or so posts with the first few lines of each. It ignores the spoiler tag so whatever has been posted is displayed prominently on the front page of the site. So, we're not really hiding anything.
Also, for years I've been trying to get people interested in the forum match, but until you go to the trouble to get a login you can't click the spoiler tag to see what's been written. So the entire thing is gibberish to potential new participants. I'll continue to use it if that's the consensus, but I don't see it doing anything helpful and it's actually a net negative.