I came here to say the same thing. Went to watch a GameTrailers preview and at that time there has been only 3 comments so I got wind of one and the first THREE words of his/her comments were freaking big spoilers. UGH. Totally unmoderated crap. It was only removed like minutes after ffs.
I've read a few spoilers but a lot of what's going around is untrue. Even if you know the cutscene name(s) that doesn't mean you know what's going to happen. Naughty Dog is smart and I trust them. Even though I've seen spoilers I still feel like I'm spoiler free. But even if some fo the game is spoiled for you, you don't know when the events will happen in game and they will catch you by surpsrise more than likely. You're still gonna be surprised or sad.
There are people posting contradictory spoilers on YouTube videos and such so I don't know what's real or not anymore. There is really only so many ways the story could end. No one dies, one of them dies, or both of then die.
A lot of the stuff I've seen lately is so far from the original legit story leaks that I think it has to be intentionally false. lol.
I know that was a suggested strategy by a neogaf poster, just spam fake spoilers so that the real spoilers get lost in the confusion.