No, screw you dude, I can't say I'm a fan (or an enemy) of id, I'm rather ambivalent about them (though I gather John Carmack is awesome) but I have to say this. When I buy a game, I want to own that game. I want to do whatever I will with that game, and it is not up to the (previous) owner of the game (Blizzard in this case) how I play this game in a non-multiplayer fashion (and the multiplayer bit is really only to keep it balanced and stop hacking).
Also, what is up with his argument? What, were the people with dodgy internet just waiting for a big company to come out and piss on them before they beefed up their connection? Or is he saying that Blizzard's power will force the people with dodgy internet to fuck off.
Geez, Blizzard has been stupid. It wouldn't (I think, I could be disaterously wrong) be hard for Blizzard to have 3 ways of playing Diablo 3, Multiplayer and online singleplayer we already know about and characters from both can interchange. Just put in an offline multiplayer option, make it clear these characters can't be taken online. There, job done, no-ones pissed off.
Edit: What is it with this industry that makes us piss of certain customers (generally poorer ones/ones in non-city areas). We fuck over second-hand game buyers, we fuck over people with dodgy internet connections.
It's like a city making the greatest universties in the world, but some people can't get in them because some primary schools are shitty, and the city is just focusing on improving the universities and flipping the bird to the ones in shitty primary school areas.