Water usage is probably my biggest. Living in a high desert, my wife and MIL see no problem with filling one side of the sink with hot soapy water to wash a few dishes because “that’s just how I’ve always done it”, to watering the grass and plants for hours. All of this makes me mental.
I read that link and I’m not sure I understand Doctorow’s reasoning on the subject. I typically find people that dismiss voting with their wallet fundamentally misunderstand microeconomics but either way, both points (yours and mine) are definitely not hills I’d die on.