I remember when glassdoor first arrived on the scene. It was such a democratizing* experience. Salaries, reviews of management and the company, and good old fashioned venting.
The web was such a different experience that we never thought about how dangerous it could be to give out so much information. I would never trust anybody with this kind of information anymore, and I would especially not hand out my opinion of a company I still work for.
*back when this term was (naively) a good thing