I do think it's the right call. You can't really surrender victory to ddos attackers, I am just curious if the who matters more than the why/how. It only empowers it moving forward if you do obviously. It also seems fairly obvious these attacks were aimed at NA RWF raiders and/or Onlyfangs in hardcore. You know, the attacks just line up a little to perfectly time wise. If it was pure Blizzard haters why not strike at NA, Asia, and Europe in a coordinated attack all at once.
Probably doesn't help that you put all these events in a tight time window making a direct attack on many targets at once much easier.