the use of all software and hardware mechanisms to mirror commands to multiple World of Warcraft accounts at the same time, or to automate or streamline multi-boxing in any way.
This is such a vague line, especially in the end that this, in my opinion is a definitive end to WoW Multiboxing. A second physical PC with a separate mouse and keyboard and monitor would technically fall under this definition.

I am not as saddened by this change as I am irritated that they waited half a year in to the expansion to implement this, after people have already spent their money on the expansion purchases. Now, I can't say that it was done with malicious intent, but more likely it's simply the incompetence regarding the matter and they've realized that their initial rule change did absolutely nothing to solve the issues they were experiencing, something we were saying would be the case less than a day after it was announced.

I knew there was a risk that this would happen, which is why I went with VERY budget builds and have some contingency for them. Still, a shame that it's all drawing to an end.