For the vast majority of folks who are or would be a nuisance in flight, I'm pretty sure:
* If they hear about stories where folks got punished for being obnoxious, they'd think "I would never be that obnoxious - that is not meant for people like me". In other words, they'be oblivious to their own predilections.
* If they are placed in a situation where their instincts would lead them to being obnoxious, they.. will be obnoxious. Even if they 'know' what the consequence are. There are a few reasons for that:
* It's a crime of passion; they can't help themselves. That's the general problem with trying to use rationality to tamper down crime: Most crimes are fundamentally not rational. You don't decide that it is in your best interest to murder someone (outside of an infinitesemal % of the population that are high functioning total psychopaths). No, you do so in the heat of the moment. At which point "Rational brain telling the id to cut it the fuck out because you might be ejected from the plane" is obviously going to have absolutely no tempering effect whatsoever.
* They honestly think it doesn't apply to them. Usually because 'yes of course obnoxious behaviour should be punished by ejecting the obnoxian from the plane. But I'm not obnoxious, you don't understand! That kid is crying and driving me nuts, I had a bad night's sleep, and I have an important meeting right out of the plane so I need my rest so I have to yell at that mom to shut their kid up, see, my intentions are good!'
Ref: Bit of a stretch, but: Similar (in culture, size, average wage, etc) locations with wildly different takes on how important it is to punish crime in order to serve as a 'warning' / to disincentivise crime by making clear that it will be heavily punished. The best place in my experience to look for this is the US where it appears to be culturally in vogue to act as some sort of wild west sheriff trope. The results? Not one iota of difference in crime rates. Or, if anything, the places that punish it more have _more_ crime, not less. And, of course, a million-and-one psych papers.
If you want to make flight less of a nuisance, the rest of this thread has the right idea I think: Given that it's so ubiquitously available and intentionally designed in that way, it's inevitable that the experience sucks. If you want the experience to be less bad, it inherently comes with a reduction in accessibility.
And on top of that, 'travel stress' is real and not something the airline industry can easily tackle. Try to imagine that travel just stresses you out. That it just does. For those who don't suffer from travel stress this can be hard to do. Maybe you have a light fear of heights; channel that. It's easy to see how the experience just kinda sucks if half the people trying to enjoy the view from some high vantage point are lightly freaking out, and they kinda have to be there for other reasons.
The person you are replying to was alluding to the fact that 'ejecting' someone out of a plane that was flying would be a demonstration the crew's intolerance for obnoxiousness. In essence, if you don't behave you will be murdered. Seeing this happen to one passenger would almost certainly make everyone else on the flight quiet down and sit still.
In my experience, the mother tends to be fairly mortified herself—and, generally being closer to the screamer than anyone else is, would certainly make it stop if she could.
Screaming children test my patience too, but I’m really not sure screaming adults do much to resolve that. It’s always seemed to me that grace is the better part of maturity.
Sometimes you simply cannot control a screaming child easily and the only way is to let them be for a while. If you don't understand it, you are really immature and need to learn some basics about human society.
Let's push it a little farther than a screaming child. Something the parent can control is their child hitting the back of my seat. The only time I've ever said something to a parent on a flight was when that was happening, and after several warning looks over my shoulder that the mother ignored. And what I did wasn't shout. I basically turned around and hissed at them to control their child. That stopped it without drawing any excessive attention.
I’m a member of human society too. Me and 80% of the people on the plane can’t stand the selfishness but have the self-control not to say anything, because it’ll do no good anyway.
But if there were an airline that charged double for rejecting kids under the “shut up” age, I’d pay double for my seat and I bet I’m not alone.