Well...when we flew with our 2 year old last October, I had his carseat and had a seat for him.
Waited in the pre-board section with two other women and their respective two year olds, and we were VERY vocal about the age of 2, etc etc etc.
And then they got on board, and BOTH of the kids sat on their moms' lap the entire flight (and in the same row, which I thought wasn't allowed), it didn't seem they had purchased tickets for their kids.
Very very odd.
And, I'll preface it by saying that we did use a carseat for that trip and will in the future, I think it's the FAA who is now saying that carseats are NOT required, as flying is statistically safer than driving, and someone being required to buy another/bring their own carseat might then decide to drive instead, and they will be less safe driving, statistically. So they'd rather have them flying and statistically safer, than driving and statistically UNsafer. em, er, if that's a word.
But despite my post, buy the seat (get a cheapie or Ding! fare, do NOT go for any "kid" fare that's going to be half of the FULL rate), bring the carseat and lots of fun toys/books/stickers, and then let the child charm the flight attendants so much (or act up enough that they want to shush her, like I think what happened with my boy

) that they bring the child a little pack with stick-on wings, pencils, coloring book, and so on.
