The ABA Standing Committee on Ethics and Professional Responsibility has issued ABA Formal Ethics Opinion 496 – Responding to Online Criticism.
The digest reads:
Lawyers are regularly targets of online criticism and negative reviews. Model Rule of Professional Conduct 1.6(a) prohibits lawyers from disclosing information relating to any client’s representation or information that could reasonably lead to the discovery of confidential information by another. A negative online review, alone, does not meet the requirements of permissible disclosure in self-defense under Model Rule 1.6(b)(5) and, even if it did, an online response that discloses information relating to a client’s representation or that would lead to discovery of confidential information would exceed any disclosure permitted under the Rule. As a best practice, lawyers should consider not responding to a negative post or review, because doing so may draw more attention to it and invite further response from an already unhappy critic. Lawyers may request that the website or search engine host remove the information. Lawyers who choose to respond online must not disclose information that relates to a client matter, or that could reasonably lead to the discovery of confidential information by another, in the response. Lawyers may post an invitation to contact the lawyer privately to resolve the matter. Another permissible online response would be to indicate that professional considerations preclude a response.