If this is about the post referring to the VO BioWare Pulse...and talking about the certain event that made them cry three times over (supposedly), then I have to question what a spoiler is to you, as nothing was spoiled; as in, no specific details were given to spoil the experience. It would be like me saying it would happen in Saving Private Ryan. Of course it's going to happen, it's a war movie. There was no who, what, where, and when given in that video, so really, you don't know anything, which means you weren't spoiled.
Now, as far as your point goes, I agree. It sucks. We have a spoiler commiserating group so that we could post things there without risking the lockdowns that we were getting before and possible bans. However, not only are many not aware of the group, but people also can't help flaunting their knowledge on what happens to the point where they can't at least entertain the thought of you going along with the debate and pretending that it's just their theory or prediction without going into huge details. It's finally gotten to the point that the mods can't keep up with it anymore, and most of the long-time members on here who were against spoilers have given in, though many of them still try to avoid doing so if they can and usually don't get too detailed into it.
However, the game is on the brink of going gold, and the press event articles will be going up in the next two weeks, which will at least cover a large portion of the beginning of the game (GameInformer at least will cover that). BSN and every other site that could post on ME3 will be full of articles and comments about the game, and many will have spoilers.
My advice? Bookmark the Twitter Thread and the Mass Effect 3 News and Announcements forum. You may not be able to post new threads, but there won't be much in the way of spoilers. That's the best I can say this close to the game's launch.