I find the whole thing disturbing but not surprising. Years ago, when I first tried to post to the Diablo II forums, they made me log in using my D2 CD Key, b.net account and password. I did it once but never again. They don't even have a secure (https) url for fucks sake.
So I don't really care that Blizzard is making their forums unusable since, in my mind, they have never been safe to use in the first place.
-420