Almost all of us have been on that flight where there's a baby screaming at the top of its lungs, and nobody's going to get any sleep or peace for the entire duration they're in the air. And yes, it's annoying. You're always aware that the baby isn't doing it on purpose, but part of you wants the parent to do something about it, even though you're kind-of aware that they're already doing everything they can. Nobody feels more awkward or stressed in these situations than the parent, however - and these forward-thinking parents have tried to solve the problem in advance.
Showing incredible generosity, they left a little gift bag for every other passenger on the flight, explaining the situation and even offering earplugs for anyone who was affected by the noise. Showing this level of awareness of other people when you have fourteen-week-old twins on your hands is just incredible.