Judging by the replies on this thread, the conservative principles of freedom and self-reliance are absolute unless it's inconvenient - but then it's only okay to stifle other people's freedoms.
I find grumpy babies and toddlers far more annoying than cell phones. Let's ban those from airplanes too.
I'm all for that idea.
Your freedom ends when it intrudes on my freedom to enjoy peace and quiet. Rudeness comes in many flavors, one of which is hearing someone's obnoxious (and usually their self importance) phone calls.
Screaming babies should be taken to the rest room or held to keep them as quiet as possible. If a mother sits idle while her baby screams at full volume, she is also being rude to others.
People need to be re-educated on public manners.