I'm gonna take a comment from the developers of the game Aion.

Paraphrased: "...Yes, we recognize botting is present in the game. We also recognize some of these users with botting programs, do sell in game gold. We recognize some users maintain multiple accounts. However, the games world content is vast, and there are more monsters, than just the small crabs which characters fight over.... Our product is driven to entertain, and enjoy. Entire companies, have been produced, purchasing and maintaining hundreds of accounts. We appreciate every customer, and will continue to strive to make each and every customers experience enjoyable."

Blizzard is not much different. They produce, and sell this games time. Not actual content. One guy makes a statement that "I dont care what you say."... and Blizzard is supposed to be concerned? Std Business models have bell curves for a reason. There are always outside flyers. The company is to cater to the mass, not the rogue flyers... not to the one guy who has a hard on for (x) reason. Those kids, with their egos hurt and their sorrowful comments of woe, need to realize, if I can search my routers settings and see 4 computers connected to it, Blizzard can see the chineese with 70+ accounts on an IP frame...or they see me, with 5 accounts active at the same time.

applying this to multiboxing... Yes, they know. The software or hardware, is no different than me purchasing a wireless keyboard, and mouse, and syncing to 5 receivers. They know.

And when it comes right down to it... I own (5) accounts, I am a $75/month customer. The one guy with the QQ is a $15/month customer. If it was your business, and you were forced to make a decision, and upset one customer... who would you side with???