How has Lefanis v. Chenier not been mentioned? That's possibly the most vitriolic feud in BM that I've seen.
For myself, Vellos v. Anaris is definitely a thing. Vellos v. Chenier is an odd thing– we tend to be distrusting but pragmatic neighbors of one another. Rivals certainly, but practical rivals usually with bigger fish to fry; usually fish named "Anaris."
