While I agree with the topic's idea, there was no need to create it.
I mean, common sense says that people should respect others, by not posting vital info or spoilers regarding the game.
On the other side, there are people and people. Every place has at least someone who loves spoiling things out for the sake of trolling. There are also people who actually spoil things by accident ( even some critics spoil things sometimes). Even though that's wrong, will you risk being spoiled? My advice is avoiding the forum, just for your own sake.
That's what I usually do with movies ( avoiding imdb and so on), only coming back after watching it.
Also note that some people ( from Press) have acess to the first 10 missions of the game. It's a matter of time until things start appearing more than ever. I mean, That's a lot of possible spoilers coming soon...
For example, one of the people who already played 10 missions. What if that person creates an account and starts spoiling things? Is that right? Hell no! Could that happen? Hell yeah!
I'm really crazy to play DmC, but I don't care with spoilers. The achievement list said a lot, but at the same time didn't say anything. It's like saying who, but no saying how. The ending of the game wasn't leaked, though some characters were. However, I'm sure there won't be any surprise here after the release. Everybody really knows who the main villain is, critics already said it and trailers also show it. The question is how such thing happens. That's what we still have to know.
So, I think we'll be ok with whataver gets released in the future, BUT if you're one of the guys who loves surprise, then it's really important taking care with the forum. Well, not only here, but with reviews and critics also.
Sorry for the long post, but it's really interesting to discuss about such subject.