Poor analogy. The horn is a safety feature, and of course basic, as it serves as a warning mechanism. In addition, if you live in a civilized area and not the wild west, you should be calling the authorities, not cause further troubles via getting "vulgar and upset".

The reclining seat on an airplane is designed to be reclined - it has 2 modes: upright and reclined, at the passenger's preference. Its usage is not a safety feature, it's an option built into it and the price you pay for the ticket.

If you are bothered by it, you can always recline your seat and reclaim your space. Literally.