When my kids were infants, the last 1hr flight left em cranky and tired. At midnight, the cabin lights were dim and my son was wailing. My wife and I felt so bad for him and the fellow passengers as we tried desperately to comfort him. I vividly recall looking up and seeing quite a few weary, yet smiling faces as folks quietly supported us. That moment has stayed with me, and if you have a crying infant on a plane you'll get nothing but quiet support from me.