Major pet peeve of mine, if its one child and they are well behaved I don't mind. I've also been on a flight with a make-a-wish family. Once again don't mind. But one of my percieved biggest benefits to flying in F is no children. I have however had one flight where the kids where talking off their shirts and climbing all over the seats, their grandparents and the flight attendents did nothing. At one point one of the kids asked the rather attractive lady next to me to take off her shirt. If i behaved like they were, the plane would have been diverated and I would've been hauled off to the pokey.
Same thing goes for the club, I won't buy a club pass because, i have been in the club on day passes (credit card, preffered extras) and had to deal with screaming children. At least I can find a bar, get some real beer instead of that budlight crap and not have to worry about kids.