To recline or not to recline? TFC's tips: when and how to do it so you don't argue with the person in the back seat
Almost all low-cost airlines, which usually have particularly tight legroom between seats, have [...]

Almost all of the low cost airlines, which usually have particularly tight legroom between seats, have cut the bull's eye: on board seats simply do not recline. Almost, elsewhere, however, they do. E seat pushed back is one of the most common causes of disputes aboard aircraft.
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They collide two parties: what it says 'if the seat reclines it means I can do it' and what he considers rude, or worse, the neighbor in front which gets comfortable and He reclines the back of his seat to its fullest extent. Who is right? Both, probably. He is, however, definitely Wrong the back passenger who thinks to 'retaliate' by planting his feet or knees against the reclining seatback in front of him, thinking or hoping thereby to induce its occupant to straighten up.
In economy class, it is unthinkable for a passenger to stand up straight as a stockfish, especially if the flight is not short-haul. But there is a way and a way to do it. In English there is a word that describes well those who, as soon as the 'fasten seatbelt' signal goes off, slam down the seat at maximum angle and then fall asleep (or pretend to be asleep) leaving the seatback down even when food and beverage service passes in the cabin: 'rude'. Which doesn't exactly mean 'rude' in Italian, but rather 'rude', 'rude'.
Of course, if the seat, reclines, it can be done. But always remembering that you find yourself Within small spaces in a metal tube (or composite materials) thousands of feet above the ground. Thus, for example, the suggestion may be to Recline the backrest only partially, or perhaps a little at a time. And in any case, never resting 'dead weight' on the backrest, to avoid That 'avalanche' effect That can only irritate those who suffer it.
If you really want to be polite (and polite), you can ask if the reclined seat bothers you. E, always, remember to return the backrest to the upright position when serving meals or drinks, because, for those in the back seat, eating with the tray resting on the coffee table is impossible if the back of the front seat is all the way down.
Every year, On social media, dozens of videos are posted of fights aboard airplanes triggered by reclining seatbacks too much or too long. To limit tensions on board and to ensure as much comfort as possible for everyone, some companies have introduced in recent times Seats that 'slide forward', increasing the angle between seat and backrest.
These are often two combined movements: a backrest that reclines at a lower angle to encroach less on the personal space of those sitting behind, accompanied by a forward slide of the horizontal cushion. The method is in use in economy class aboard Emirates' A380s and Gulf Air's A321neo, just to name two companies.
In Premium Economy, instead, Air France has on some aircraft (such as Boeing 777-300ERs and 787-9s) rigid 'shells' surrounding the back of the seat, he can only slide forward (with less than comfortable outcomes, it must be said). The system was also introduced by Lufthansa in the new premium economy of its Allegris cabins.. In Business on the other hand--well, even from that point of view, that's just a whole other world.