I don't think that observation is related to Blizzard or Diablo at all... This is just the state of the world now... Even this site is a good example of it... Every story/product about anything people are interested in gets scrutinized like crazy, and that's not likely to ever let up...
It is related to Blizzard insofar as it was their decision to make the game completely online, thus subjecting it to these external considerations needlessly. I agree with you about security in general, but that is all the more reason to have released the game with an offline option for people like myself who don't give a damn the online features. Something is wrong when every major story pertaining to a long-awaited blockbuster game are about things like DRM, server outages and account hacking. What are the odds that someone new to the series and considering buying it is going to want to subject themselves to all these potential pitfalls, especially when all of what they read about the game references exactly that?
“The greatness of a nation and its moral progress can be judged by the way its animals are treated.”
- Mahatma Gandhi