Violating the duty of confidentiality when replying to an online review

The Legal Profession Blog is reporting that the Illinois Administrator has filed a complaint alleging that an attorney violated her duty of confidentiality by responding to a client's unfavorable review of her services.  There is nothing inherently wrong in replying to an online review, but just like anywhere else, you have to be careful about what you say.  The attorney in this case allegedly disclosed more information that was necessary (in fact, more information that was relevant) and thus is now facing the complaint for disclosing confidential information.