COMMENT: Apparently it's become the accepted wisdom that it's rude to recline your seat on a plane
You should never do it because it shows you have no consideration at all for the person behind you... supposedly.
According to Jarrod Gilbert's comment piece, if you recline your seat on a plane, you are an ass.
Now, I would've thought most right-minded people would read this and immediately write it off as garbage. But you would not believe the number of people I work with who actually agree with it.
These people think you're the worst kind of human if you put your seat back. They think it's the height of rudeness because it takes space off the person behind them. It makes them feel uncomfortable, might stop them watching their screen comfortably, might spill their tea.