Here's a word Poor, Poor Pitiful Pitt may become acquainted with:
Libel.
I think you have to prove harm to succeed in a libel suit. There ain't a DUchebag that files so there would be no loss of revenue to Ituit. However, if a company has a legal department they pay for all the time why not use it and run up the legal bills for the biggest lying DUche on the site. I would as a couple hundred hours at $400 per, would put a dent in his unearned stash of cash.