Should a musician tell loud fans to be quiet?

Some friends went to a concert at Stubbs indoors last week.  During the artist’s set some people, who happened to be close to the stage, were engaged in loud, drunk conversation.  This disruptive behavior continued for awhile until the artist told them to move to the back of the venue if there were going to be loud.  

Some people were glad the artist did this and others were angered by it.  What do you think?