I depends on your definition of discourse.     If you believe two kids throwing schoolyard insults is 'discourse,' then you are absolutely right.   I've looked at several definition this morning, most imply the participants have some level of knowledge about the topic of conversation.    Creative insults are not an indicator of subject knowledge.    

A discourse is not a cat fight, it's a conversation with some depth of expertise.    I've seen lots of writers with a good core of knowledge or wisdom completely lose their support because they had to throw in demeaning personal insults about those who have a different opinion.    

I know that I make mistakes in my writing, I know I've changed my mind on several topics over my 40+ years of adulthood.    I've learned from the wisdom of others, often gaining knowledge that I was unaware.   I've never changed my mind by being shouted at or insulted.  

Discourse is two way communication/relational,  not just stating one's own opinion.  IMO