first off, although there is a question as to whether or not it was ethical to post the personal conversation I have couple of things to point out.

1. the person was not identified in the post at all so it is posted as anonymous and not singling anyone out at all. We all know that the op did not post this as a cybercriminal trying to defame anyone specifically but was baffled by the conversation. people post "he said, she said" all the time here on the forums about their own partners, friends and such, even quoting abusive statements and things. Do we censor any kind of re-hashing of conversations because what, this was done in electronic form? how is this different than me telling you if my gf, said that I was a blah blah blah, called me names, hit me, threatened me or anything? Seriously people I get what you're saying but there is nothing tying this to a specific person and everyone is jumping to conclusions.

also, cyber bullying really? It seems to me that the person the OP posted about is far more clearly aggressive and trying to bully someone! WTF. Nothing here is about bullying come on. Why does the term cyber bully even come up in here? it's NOT RELEVANT!

The person on the other end threatened to report the OP for a hate crime, really do you think emailing said person and asking permission to post their toxic crap is a reasonable idea? do you ask your partner if you can post junk about them when you're upset at them? do they all know what you post? are you a cyberbully because you quoted someone's offensive posts? :/ smfh.

@OP I wouldn't worry about that person, it really matters very little if they are serious or not. If you can I would report their threats on the site you spoke of or wherever you had the conversation that is related to this. I'm assuming a music site where you post your music and lyrics and such? anyway... block, ignore and move on, and if they actually do pursue, I'd keep a record of what they say to report them again if necessary.