Many travelers are sick and tired of having to put up with other people's children while flying. Julie Bindel noted at The Guardian:
As a regular flyer, I cannot tell you how overjoyed I am about the news that Indian budget carrier IndiGo has adopted a “quiet zone” policy that bans under-12s from its premium seats....it sets a precedent for an airline to acknowledge that young children can be a total pain in the arse for other passengers.
But babies' eardrums hurt when they fly. They're not crying to be malicious, they're in pain. And it's tough for little kids to be confined in a small space for many hours. Can't people have some empathy?
Plus, some children are perfectly calm and well-behaved, but we've all been on flights with loud, belligerent adults. The hardship of listening to a crying baby on a plane is pretty much the definition of a first-world problem.
Crying or misbehaving children made the top five complaints about air travel in the Trip Advisor survey. Many people would seriously prefer snakes on a plane to a screaming baby. If people are willing to pay extra for Quiet Zone seats, where's the harm?
Guess who's the most upset about a crying baby on a plane? IT'S PARENTS.
People really do treat travelers with babies poorly, and will even yell at them for not being able to quiet their child. Again, we were all once screaming babies violating someone's quiet space. Kids are not devices you can shut off for the duration of a flight.