I believe unwritten rules (also could be known as "norms," "commonly accepted behavior" etc etc) help to facilitate human interaction, rather than inhibit it. They exist all over, and baseball shouldn't be expected to be different. If not for the "unwritten rules" there'd be lots more "brawls" rather than fewer. I truly don't understand the over-the-top reaction some fans seem to have to their existence. As for the contention that "culture" has much, if anything to do with baseball's unwritten rules, I think it's unlikely at best. There are different cultures on every team. "Brawls" happen with people from both teams, of differing cultures. Many of these "unwritten rules" existed long before there were much in the way of differing cultures even in the game. Want to guess what Pedro Martinez would have done had someone pimped a HR, carried his bat halfway to first, and then tossed it at his dugout? Care to guess whether it would have mattered if that batter was from the Dominican, from California, or from Mars? There aren't many "brawls," anyway. The ones that happen, happen between TEAMS, not cultures. That's my point.