I'm wondering if it's ethical to spread the word about someone who didn't pay you back. I mean, obviously the another one wasn't ethical, but are you allowed wh

I'm wondering if it's ethical to spread the word about someone who didn't pay you back. I mean, obviously the another one wasn't ethical, but are you allowed when he/she wasn't? PS: Surely I'll not post on HN another history of someone who didn't pay me, I'm trying to know the ethics implicit on this scenario.