First, constructive
probably impractical to ban kids, not to say "can you imagine this on the New York times front page"?
The issue is really the mix of business people, singles etc with kids in the same part of the plane. How about not assigning seats for people with kids until check-in? That way, you could move all the families in the back of the bus, all the kids together, etc. Fill it up back there with the cheapest tickets and mileage fliers. Move flight attendants there who like kids (they exist) and pronto - you have a nice kindergarten with really no additional work.