Lefthanddown, it doesn't matter what you put in the briefings or on the cards if the punters pay no interest in it. I keep the PA selected on on my selector at a low volume, and if I hear the cc pause the demo a second time to tell folk to pay attention, I put the brakes on and make a similar comment. I have thrown a handful off for continuing to be disruptive during the demo in the past, but we shouldn't need to get to that stage if the passengers were more reasonable. Stopping all sales of alcohol in the airport would be a good start to improving behaviour and attention on the aircraft, I think.