@evan the law of air travel should state this…
Prohibited behavior
(a) Reclining seats: It shall be illegal for any person to recline their seat in economy class unless the persons sitting directly behind and in front of them have also reclined their seats.
(b) Armrests: The person seated in the middle seat of any row in economy class shall be entitled to use both armrests, while the persons seated in the window and aisle seats shall be entitled to use one armrest each.