This is actually a phenomenon I simply do not understand.
Were there simply too many people there who had won tickets or otherwise weren't all that interested in the show? I don't know. But it makes me feel like doing my old lady grumble: people these days are lacking in common respect. That kind of behaviour is terribly rude, both to the performer who's up there for your entertainment, and to the other members of the audience, who want to be able to hear and enjoy the show. Young people these days...
Grump grump grump.