I guess I’m on the other side... The airlines allow reclining. That’s why there are reclining seats in their planes. No one is infringing in “your” space by reclining his or her seat. If you lost some space up top when the person in front of you reclined in his seat, then recline your seat and gain it back.
I’m six feet tall and I’ve never had my knees “hit” by a reclining seat in front of me. If I were considerably taller and it happened, I’d stretch out some more and put my feet further under the seat in front. You know, try to be a gentleman about it. There is some room for that. Don’t sit there with your knees under your chin, whining about the seat back hitting them.
The last time some guy behind me started braying about his knees, I turned around and looked at him and he was all of 5’3”, with his own seat fully reclined. I leaned over, let my well-exercised 20” guns show a little and didn’t hear another peep out of the jerk. Those were the days.
What about the folks in the back row who can’t recline their seats?
"You're ok there, Moose"