Carabin: No, it's not. Thankfully the idiotic post was deleted, by a mod/admin, I suppose.
Lin: Indeed, the spoilers will be there, but at least you'll have to choose for yourself if you want to see it or not. If you fall for the temptation, it'll be your own fault.
But accidents aren't fun either, and it's not fair to be spoiled about major plot revealations just because you did a mistake. The current way of trusting the mods/admins to delete spoileriffic posts actually worries me - mostly because the staff isn't terribly active here and a disrespectful member could easily troll the forum by post spoilers everywhere, and the posts would be there for several days if the staff don't log in and do something about it.
Yet another idea I thought of is if we could have a subsection in the "Get Backers Manga Discussion Board", called something like "The Spoiler Area" in which you discuss facts that haven't been revealed in the manga at this point. If possible, the topics should be "hidden" in a sense that you can't see them unless you go to the spoiler subsection itself... know what I mean? So that we don't get spoilers from the titles of the topics that were recently posted in. Since it seems like we can't have tags, it'll be easy to have a spoiler policy as simple as "Don't post [manga] spoilers ANYWHERE outside The Spoiler Area, PERIOD".
Shame that this forum isn't too active, I DO want to know what other members think about this subject, not to mention I want to hear what the staff has to say.