I think this article says the right thing. Sometimes it is, you have to be mindful of others around you. I know that's a rare concept in the USA especially. Everyone only thinks of themselves then gets mad when that attitude is turned around on them.

As a frequent flyer, who's 6ft 220lbs, on those rare occasions I don't get a first class upgrade I try to be very mindful of others around me. Not just reclining the seat but trying to keep my arms crossed in front of me to avoid encroaching on the person next to me. Because the simple fact is shoulders are as wide or wider than many coach seats.

People who reclining their seats during food or main drink service need to be spoken with by the flight attendants. I've never seen it happen here in the US but nearly every Asian flight I've been on during the food service they'll tell you to put your seat up. After cabin service and the lights go down for resting then it's less of a problem because everyone is now reclining.

Always consider how your actions effect others, even if that other person is rude. It seems to be in fashion to hate on Christianity but this simple concept of do unto others as you would have them do unto you is a concept that transcends religion and time.