Ending of a friendship - a dangerous one

Scenario: I am afraid a player has reported me that was very close, leadership in my guild; and is disgruntled. We have many mutual friends. I’ve never said anything about them in game; however I admit I definitely used choice words on Discord to defend myself. Can I be actioned on World of Warcraft for something I say outside of game? I hate that this got personal, I have not threatened the other party. Sometimes these things just happen. I’ve been called some choice things by them too.

please don’t meme on me too hard; this is actually a pretty heartbreaking situation for me.