If you decide to report to anyone, is it a bad idea to keep a log of what he says? Not necessarily audio (depending on jurisdiction), but keep a journal? Then y

If you decide to report to anyone, is it a bad idea to keep a log of what he says? Not necessarily audio (depending on jurisdiction), but keep a journal? Then you can point out what insults were levered against which people on which dates. It would make your complaint much harder to dismiss. And it would be pretty bad if said report was leaked to other employees. People might put up with this stuff one by one, but hearing the insults about themselves suddenly changes things. Though again, this might be a horrible idea.