Hard to believe, but it's true. A small consulting firm sued Glassdoor to get all information from people who left bad reviews and won. With that information at hand, they are now suing former employees for defamation, and also using that info to disqualify them as witnesses in other labour lawsuits. I don't know if that have a case or not, but it was just mind-boggling.
It's so fucked up, people post on Glassdoor thinking they are protected!
(sorry the news is in Portuguese)