Why does the Lawr keep coming up? I have yet to see anyone say that there "oughta be a Law" about kids on airplanes (at least with any degree of seriousness). The notion is ludicrous on its face. Maybe that's how you manage to see past the fact that bringing a screaming, pooping, terrified, feral semi-human in to a packed aluminum tube is, uh, you know, kind of the opposite of "polite". "Well, thems tryin stop my FREEDUMB!"
No, thems just pointing out that while it might be unpleasant for you, too, you signed up for it, and we didn't. I bring us back to the point that if anything else made noises considerably louder than a car alarm and unremittingly pooped all over itself in a space so confined that it would be a war crime if foisted upon a POW, it wouldn't get past the TSA, let alone be accorded some special Status which makes it Monstrous and Inhuman to complain about. If an adult human shat all over itself and screamed at the top of its lungs on a flight, there would be a lot of rah rah when he or she got tazed, and rightfully so. Explain to me, again, why it's heartless and nasty to be peeved that one is expected to accept, casually, the high keening whine of a terrified infant, scared out of what mind it has so far developed, as its sinuses underpressure and it expresses pain in the only way it knows how because Mommy and Daddy "need" a vacation. Own your choices, mankind, ffs. None of this is about Law, it's about respect for your fellow adult human beings. Reproducing doesn't assign you some special status which abrogates common courtesy. As mentioned above, just about everyone is capable of it, no prizes for fertility in the 21st century.