Greetings!
Technically the answer is Yes. But this is so really only if you go to the beginning of the "modern-day" Organization.
For all intents and purposes, in the beginning the Society WAS Charles Taze Russell and CTR was the WTBTS. At the turn of the century, a local gazette, the Brooklyn Eagle published a lot of bad press against Russell and came to print a cartoon of him involving the Miracle Wheat Scheme.
Russell sued for libel and defamation. A lot of INTERESTING things occurred during the trial including admissions that were made by certain Society big-wigs and I think that the Society learned a lesson very early in its history. Incidently, Russell lost the suit.
During the 20th century the Society brought either separately, or backed individual plaintiffs or sometimes together with other groups brought numerous claims regarding free exercise of religion as is well known. Some of these might have resulted in monetary compensation for individual plaintiffs but I would have to research that further to be certain.
In today' s modern litigation, I think that the Society would be extremely careful to initiate any kind of lawsuit and certainly seeks to avoid as many as possible. Modern discovery rules would allow opposing counsel to poke into all sorts of hidden nooks including actions, operations, expenditures and finances, electronic records and many other things that the Society has kept confidential.
As far as a defamation lawsuit, the chances of winning are so low and what needs to first be proven is so high that I can't imagine a circumstance where it would be worth it to pursue.
What we also must remember is that from the Society's viewpoint a certain amount of mudslinging and criticism is beneficial. The Society promotes the myth that it is God's sole organization on Earth, that it as the physical part of the "bride of Christ" is due to receive much persecution, etc. and these things only serve to reinforce the US vs. THEM mentality and culture. So rather than try to stop any defamation occurring the Society would just point and say "See we told you so. Satan's system is out to get us. Didn't Jesus say his followers would be persecuted? yada, yada, yada......"
-Eduardo Leaton Jr., Esq.