You have the competing interest of the right to free speech versus slander and defamation of character going on here. I would definitely report it to Facebook, because it violates their policies and procedures and they may even take away his account. He will undoubtedly just create a new one. You could ask a judge to issue a cease and desist order and an injunction and require him to take it down. However, as far as suing, what are your economic (financial) damages? Definitely, you have embarrassment and hurt feelings. However, litigation is extremely long and expensive and not very satisfying even if you win. To quote this guy how much of your time, energy, and emotion do you want to waste on a f***tard like that. He sounds like a major league loser to make fun of someone in that manner and his 50 plus "friends" are probably pretty pathetic as well. I suggest that you do not waste your time on him and concentrate on positive things like moving on with your life and being happy that you are not part of such a screwed-up bunch of in-laws anymore.
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There are plenty of civil actions you can pursue. The most obvious is defamation, but there are plenty of others that may be applicable depending on the specific facts of your case. I would expect your damages, as measured by the harm to your reputation, mental distress, etc., will be somewhat low. However, you may be able to receive punitive damages as well, which could make the case appealing to an attorney as a contingent fee matter. Given all of that, however, you may want to consider my colleagues advice, and let it go.
Good luck with this matter!
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I don;t see a criminal charge and I don;t see a civil claim resulting in any payment to you. What I do see, however, is an opportunity. In a comment to Mr. Leroi, you mentioned that the man who posted that note is in the United States military. Contact his base and keep searching until you find someone in his chain of command. Report the conduct to that individual and my guess is things will happen that you may never learn of -- and the conduct will stop.
Best of luck. Don't stoop to that guy's level.
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