Is it REALLY a "beef" if its funny?

When did it become cool for comedians to have beef. We saw it earlier this year with Katt Williams and Steve Harvey, not it looks like "WHAT MY NAME IS?" Shawty Shawty and Lil' Duval are gong at each others necks...this could be interesting because both of these guys are the types of fools I used to get kicked out of class with in high school.

ANY BETS on who's funnier???