While they're at it, can they also sue hotels that respond to hotel reviews with boilerplate "We're sorry that you had this experience, I will review this incident with my staff so that this will not happen again. We strive to provide the best service..."
Translation:
"We're sorry that you had this experience, I will lie about reviewing this incident with my staff so that you feel better about us responding. We strive to deceive everyone reading these reviews to make them think that we actually do anything about the negative ones."
If anything, THAT is a deceptive practice.