You're still missing the point. (God I hate airplanes so freakin much)
An airplane is NOT a public space.
It's a pressurized little container where people are jammed packed like little fucking sardines. The average seat size has been reduced due to greed, while the average ass size has only gone up.
So it's greatly uncomfortable as it is. Let's add to it ridiculously uncomfortable seats, and the fact they can recline annihilating the space for the passenger behind you. Your option? Recline your seat as well to reclaim the space. Last row that can't recline. You're fucked dude.
You got problems with poor circulation and neuropathy? Ehhh, fuck you and stay sitting period. You can't even get up to stretch your legs unless it's the weak pretense of going to bathroom, and there are only two of those SOB's on most flights.
Then there is biggest restraint. It's a pressurized fucking container moving 500+ mph through the sky and you can't leave .
It's not a public space by any stretch of the imagination. It's an agreed upon temporary prison not designed for comfort at all with the sole purpose of ferrying your ass as fast as possible between two points.
So let's be pragmatic in the approach and not so high and mighty about who gets to do what and how freedom shall not be tarnished and the wings of liberty can't lose a feather.
Can I leave that environment at any time when some asshat like you thinks I should just spend my money for sensory deprivation equipment because you want to dominate the space with your loud incessant talking on the phone? You might want to think that through for a sec....
Cuz... I will fucking kill you. They will pull you off that plane with peanuts jammed up your nose, and that life raft/vest/fart-catcher sticking out your ass. Ohh, and I will be wearing your fucking ears around my neck as a sign of my kill.
I'm not trapped on that plane with you, you're trapped on that plane with me. I'm uncomfortable. I'm pissed off that the TSA didn't lube up on that pseudo random investigations they do for security theater. I'm possibly a little dehydrated cuz I didn't want to spend 10$ for a bottle of water and $3m USD for that turkey panini to raise my blood sugar up. It's not just me either. Keep that in mind.
You're general audience is pissed off (at least to some extent), frustrated, uncomfortable, hungry, dehydrated, dealing with snotty children and babies, and CAPTIVE . Good luck if you want to be the asshole and become the center of attention.
P.S - Having a conversation with another travelling passenger at a reasonable volume is just fine. You should just be civilized and keep in mind that nobody has the choice but to put up with you, and they have no where to go.