It is stupid… But rappers do it o let people know that their city is putting out good music… When the east coast dominated rap it didn’t like no one outside of New York get on.. So people from the west had to start shouting out that their brand of music is the best… Same thing when the south was trying to get on nobody wanted to hear them so they had to start shouting out that their region is putting out good music.. Same thing is going on with the Midwest now…. Nobody wants to hear much from Midwest rapper these days.. So they have to shout out that the Midwest is puttin gout good music.. Personally I don’t think nothing is wrong with repping your city… As long as you ain’t talking about killing or blasting on somebody else city….