nothing is impossible - people here have proved time and again. Especially 10 boxing, i personally was skeptical and yet seeing people clear most of ICC is pretty spectacular.

It raises a particularly interesting point about multi-boxing

Do you play for the challenge of playing against the initial design of WoW, or because you can easily kill/clear content? Like Khatovar I'm in it for the complexity and challenge of "can it be done with 1 person".