I don't know why it's so hard for people to understand that conversation and other disturbances are really hard on performers - and audiences. I get the same kind of stuff, mostly from adults, when I'm singing to groups of kids. Usually, I put up with it and muddle through as best I can. I do have a remedy that works pretty well, however. I call it the "torch song maneuver." Barbara, go sit on the guy's lap and sing right to him. Tussle his hair a bit. I did that to a guy once and the guy never spoke another word - not ever....
-Joe Offer-