I fly frequently.
The only time I have ever used the recline function was when there was no row directly behind me. I consider it the height of rudeness.
I have been made very uncomfortable by people in front using theirs.
With space in planes being used up by extra seats, I think the recline function on all seats that can interfere with seats behind them should be disabled.
The thing is that you don't need to have a seat that reclines, so why not make sure that...