From an e-sports point of view, I can see why blizzard decided to do this. It's like the dress code for the NFL and fining golfers for spitting on the green. Starcraft 2 is the golden child of e-sports right now and Warcraft 3 and WOW were for a long time up there in the foreign (foreign = non Korea) community as high profile games. Original Starcraft outside of Korea is dead, so is WC3 and competitive WOW arena is painful to watch. Imagine watching a junior high school football game from five different helmet cams instead of the bleachers. So for Blizzard to want to try and clean up e-sports as it becomes more and more popular is completely understandable.

However I wonder how Blizzard feels about the pro Starcraft 2 scene. There is a LOT of money changing hands. High profile players are making a lot of money by streaming their play on TwichTV through advertisements. All day long, people are paying $20-$200 an hour for training/coaching sessions. Sponsors are all over the place from big companies like Intel and Monster to micro retail websites you have never heard of.

What is the difference when someone says I'll pay you $x for some Starcraft 2v2 games and someone who says I'll pay you $x for some Arena carries.