A shouting match is an argument or debate characterized by the loud volume or intensity of the participants.
Large assemblies may easily degenerate into shouting matches as the participants raise their voices just in order to be heard. To control this tendency towards chaos, rules of conduct such as Robert's Rules are often used.
Some assemblies may choose this form of discourse deliberately so that creative contributions are not stifled by formal rules. The Bourbaki working parties to... plus