In the past I've been tempted to leave reviews for bad employers I've had. I've always come to the conclusion that the risks of doing so totally outweigh the completely minimal rewards. The risk of being deanonymised, and receiving retaliation from the company is too high. My threat model didn't include the possibility of litigation compelling the company to hand over PII. I was more concerned that I'd inadvertently betray my identity in my review. Not to mention the issues related to Glassdoor as a company, and their lack of objectivity. Why do people use their service in the first place?