I'd never use it myself, but I doubt I'd quit the game over it. If other people want to use it, they can knock themselves out for all I care. If it got to the point where items bought from this in-game store were REQUIRED for you to make any real progress in WoW, I probably would quit. But I doubt that'd be the case.
Also...poll options don't really have my answer. Only one "no" option, and....that option appears to be kinda biased.