Something a lot of players don't realize is, if they were allowed to design the game through whining and petitions and platitudes and threats to quit, we'd end up with a poorly-designed game. They don't understand the need to leave game design to the game designers. They're demonstrably better at it than players are -- they made World of Warcraft, after all.

Fortunately Blizzard, in a position to know better than any of us, doesn't believe that multiboxing breaks the game. They base this decision on a lot of different factors, including their apparent conclusion that multiboxing does not unfairly and negatively impact anyone's game experience. If some very vocal people on the messageboards choose to work themselves into an emotional frenzy over the subject then that's their privilege, but Blizzard has been clear that this emotional response is not equivalent to a game-breaker requiring revision.

So ... done. Understand who calls the shots and you don't need to worry.