I'm on a train, on a journey of several hours. Two hours in, and the family across from me are driving me nuts. Both parents are staring at their phones. DS (6-ish) is keeping up a constant, and very loud, stream of 'Dad, guess what?', 'Mum, watch me do this' and so forth. Neither parent is responding at all, not even looking up from their phones. They seem to have learned to edit out their child completely, but I haven't, and I can't concentrate on anything. WIBU to say something, and if so, how do I put it? I don't think I'd be bothered by a child/parent conversation, it's the constant stream of 'hey mum', 'hey dad' at full volume which is annoying. Moving seats isn't an option as the train is full and if I leave this (pre-booked) seat I might not find anywhere else.