A lawyer being sued by a New York law firm for defamation made the unfortunate mistake of attempting to implead opposing counsel as a third-party defendant in the lawsuit. As a result, the attorney was sanctioned by the court in the sum of $14,000 for employing a "frivolous" tactic. For more about this story, read the Corporate Legal Times.
This story illustrates an important point. It is inappropriate to attack opposing counsel in defamation cases (or in any case for that matter) because the attorney is simply doing his or her job. Furthermore, do you really want to harm the reputation of a defamation attorney? Instead of attacking your adversary's attorney, focus on the issues at hand. Typically, all your opponent is seeking is a takedown of the alleged offending material.