Which is what he eventually typed in. Like so many things with Blizzard, it would be fascinating to see the stats behind the information they're getting here -- do they see a little bump in quitters every time new patch notes come out? Is customer support really the biggest issue people have, or is harassment a major reason for people leaving as well? Just boredom with the game seems like it would be a huge reason to me, but there's not really a clear option for that either.
Unfortunately, we'll probably never know the real stats behind this -- Blizzard isn't going to be revealing why people are leaving their game anytime soon. But it does seem strange that some of the biggest reasons you'd expect aren't on their list of possibles at all.