This article refers to general identity theft; according to the article, the theft was then used for account creation for the Lineage I service in Korea only.
We encourage you to take every precaution necessary to protect not only your game account but your personal identity as well. Please take a look at the Security FAQ (http://www.lineage2.com/support/security_faq.html) for more details on steps you can take to make sure that your information is secure.