No, I agree. And, while the fight against reimbursement and such is worth it, I am not sure going after these people for slander would be worth it or winnable. However, if it is out and out defamation, you can ask the owner of the site to remove it. Be kind of hard to sue them any way given they don't reveal their identities. I do believe they are a joke (the sites), but, unfortunately some people believe them.
I suppose when ten people write absolutely glowing remarks vs. three obvious chip on their shoulder negative people, it helps.
Every time I have a situation like the FB incident, I call my attorney, and he says the same thing. Fighting it will just make it worse. It's sad. To the tune of $50.00.