You travelling in economy? The exemption is only for economy.
Unfortunately, yes.
No need to justify yourself to anyone for flying coach.
I didn't know that passengers under 16 were exempt. Changes my calculus for an upcoming family simcha.United Mileage Plus also seems to charge the full amount for children.
Yep, most people don’t know about that, and that’s probably why these airlines get away with collecting it for minors and keeping it. But if you check the British airlines, such as VA and virgin, they do it correctly. Most European airlines do.