Is Anonymous behind the illegal access?

Here's the link to the security update, it's VERY important that you read this.

http://us.blizzard.com/en-us/securityupdate.html?utm_source=internal&utm_medium=launcher&utm_campaign=wow&utm_content=left-banner

According to the link, it says that no financial information was compromised. But the emails, and passwords were accessed. This is how Anonymous would usually attack other networks, and sites. Anonymous is known for their on popular online services, and networks like Facebook, Youtube, Activision, Amazon, League of Legends, and Sony. They are also possibly responsible for the shut down of Playstation Network.

Blizzard's network isn't the first one to get illegally accessed in this type of way. Other sites have faced this sort of breach.