I think you'll find that most people that are around you and your family will feel worse for you than for themselves if your child does cry. Every so often you get a person that either doesn't have kids or forgets what it was like, but most people are helpful and are just glad that it's you and and not them that are dealing with it!!
People should remember to "not see through people, but see people through". It's a long story but a great saying!
Happy cruising (&flying).