It’s a controversial move. Some customers and airlines say the policy gives people traveling for business a better chance to get work done or grab a nap. Others think the policy is discriminatory.

Currently no U.S. carrier has made the change, though a few international airlines—including Air Asia, Malaysia Airlines, and Singapore’s Scoot Airlines—have created policies in the last few years.

In 2013, Scoot Airlines created its ScootinSilence upgrade, preventing children under the age of 12 from sitting in particular rows. Malaysia Airlines banned infants from first class flights in 2011 and introduced kid-free zones in economy a few years later. AirAsia utimately followed suit.

Richard Branson was once interested in developing a separate cabin for kids with nannies who could watch them. The so-called kids class was scrapped due to issues with the Civil Aviation Authority, Branson said in an interview with Condé Nast Traveler in 2014.

Many travelers responded positively to the move, saying they would even pay extra for the option.

An airline has introduced #childfreeflights and I feel like the world is answering many peoples prayers right now.

— Laura Rogan (@lauraroganxo) October 6, 2016

https://twitter.com/tizinyourface/status/786644061847490560

https://twitter.com/robhowardmiller/status/765844035986661376

I'm surprised airlines haven't agreed sooner to #childfreeflights Easy profit to be made for those people who want a blissfully quiet flight

— Ami (@wonderlust_84) October 6, 2016

Others are frustrated with the policy, calling it “ridiculous” and discriminatory.

I sensed this on my recent IXJ-DEL flight. #indigo so discriminatory on part of u to announce such a ridiculous offering #childfreeflights

— Manoj Kumar (@MtmManoj) October 6, 2016

https://twitter.com/Linela22/status/632742619249025028

#childfreeflights?! What's next? Child free restaurants, malls, libraries, theaters, stores, parks, etc.?! Get real!

— Renee' Hatfield (@RHatfield0827) August 15, 2015

This #childfreeflights idea will only increase the discrimination certain families get on long-haul flights. @patriciatallman

— Nico Sarti (@nicosarti) October 7, 2016

This post originally appeared on Travel + Leisure.