It's inappropriate to yell at people.
Tom is about to give a speech to a crowd and there is a mic stand about four feet in front of him.
Tom wants to let everyone hear him while he gives his speech.
Tom walks up to the mic stand and addresses the crowd in a moderate voice using the microphone.
Tom decides not to use the mic stand and yells at the crowd.
The crowd claps after Tom gives his speech and are appreciative the sound was good and that he used a mic.
The crowd shouts back at Tom to use the mic as his speaking is obnoxious to them.