I was once a PS3 user and had Dawnguard spoiled completely for me because of a post by one person in the general discussion who essentially wished to discuss the story and failed to put spoiler boxes around the surprises in the DLC...the ending of dawnguard was lackluster than it probably could have been (or maybe not) simply because I happened to stumble across that. The DLC depreciates in value as the surprises in one's enjoyment of the game get taken from them.
On the flip-side of things I urge anyone who wishes to not be spoiled to stay away from the spoiler section and it would likely be in the best interest of you to stay away from the forum for the first few days since undoubtedly people are going to post in the wrong sections...
This thread doesn't really need this post but considering the amount of new people to the forum thanks to the dragonborn dlc announcement I figured a quick request and reminder wouldn't go to amiss.
note: the game has not yet released and evidence of a werebear or werebears being in the DLC is currently unconfirmed as is whether or not anyone can turn into one. That likely will not remain in question for long since the beta testers are probably itching to tell people what is and is not in the dlc.