"Blizzard says it's okay." <--- that is pretty much all that matters at this point. Not only that they said it's okay, they did so in a manner that pretty much clears up any questions about it. So if someone wants to ignore that and insist that it must be stopped, I don't really care much. I will still discuss the issue on the WoW forums from time to time, but it's been pretty much cleared up as well as it can, and there aren't many arguments left, aside from "I don't care what Blizzard says, it's wrong!!!" And they can argue that until their lips fall off, such a dumb and self-defeating argument is best left to stand on its own.

If people want to run to other forums to complain, more power to them. The responses I've seen in the past from Blizzard reps make it pretty clear that they don't see a time when they will outlaw multiboxing, though they will always reserve the right to do so if it becomes necessary. People complaining about it are spitting into the wind at this point. That's not my moisturizer of choice, but to each his own!