Well taking the quote with some salt, they might be more forgiving to it being used outside MP/ PVP.
No, there tends to be very little "b..b...bb..bbut" room in these sort of things. Especially when they make it clear like they have here with the WASD issue. They will likely ban folks no matter what.
Hmm, Blizzard didn't ban the people who used X-Mouse Button Control-script in SC2 (a program that lets you bind any button to any button, including mouse scroll so you'd be able to do some impossible maneuvers with tricks).
So why would this be banned?
Because: http://us.battle.net/d3/en/forum/topic/4662316885?page=15#290
Im just trying to be honest here. I don't think its a good idea to try and find a way to get around what they have specifically stated. Any kind of flimsy past precedent ain't gonna save you from the sounds of that post. They are very clearly saying they wont allow it. IMO its not worth it.