No four words incite more acrimonious debate among air travelers. Not "your flight is delayed." Not "here's a new fee." Not even "snakes on a plane."
On one side, you have childless customers who just want a little civility while they're locked inside a pressurized aluminum tube. And on the other, parents who believe airlines should accommodate anyone, anytime -- particularly their beloved offspring.
Kids on a plane! 5 fixes for unruly young passengers - CNN.com