Well I have been a many, many flights with screaming children and let me say that it is something that most people can tolerate for 10 to 15 minutes. If they child can not be calmed and settled down by the parent within that time, then they should be escorted off the plane. Just this year I had a flight from SFO to Miami and there was a sick child 2 seats over form me, 4 years old. The poor child coughed so hard it made me hurt for her. Her mother was very nice and tended to her daughter the entire trip, thank God I had ear plugs in. Even with ear plugs it was a very difficult flight to hear that for 4.5 hours. Not the child's fault; the parent should have never flown with her child that sick. The flight attendants were useless. That was American Airlines BTW.