So these guys got banned because they were smarter than the game? Way to be douchebags about being outsmarted blizz.
I think the GM handled it well and was rather nice considering s/he could've probably gotten in quite a bit of trouble for discussing it as far as it went, and seeing as to how your standard GM doesn't have the power to really do anything about the situation, there wasn't much point in going to them... but as a whole I've become very disappointed with how Blizz has handled some incidents like this one and the guy with the GM shirt....