Comment Seat size is well defined (Score 1) 819
On most airlines size and pitch of seats is well defined and listed when you purchase tickets. I mostly fly United (not that I like them, they just go where I need to go) and seat size is clearly listed.
You can pay extra and get an "Economy Plus" seat that is promised to have extra leg room and may otherwise be more convenient.
Seats that do not recline are also clearly marked.
That is to say - you pay airline for a very specific set of conditions, and it is airlines job to provide those (as limited as they might be).
People that need more knee space/seat space etc are able *now* to buy seats that fit to their specific size. What they cannot do is buy a cheapest ticket and then attempt to make up for lack of space by taking some of the space *I* paid for.