The library I worked at for 25 years had all sorts of policies the employees didn't know about. (And the policies keep changing and getting updated.) Yeah, the employees were told about them at hiring, but who remembers? Even if the policies are noted in a pretty little booklet, who reads that and keeps it around?
Do you know all your company's policies as pertains to its employees?
And isn't it common sense? You don't badmouth your employer to a third party who also happens to be a stranger (and is on the air no less).