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.
I think the general point is that the financial hurt that I can put on a company is peanuts compared to someone with deep pockets (ie: shareholders & businesses). Even if I were to get all my friends, family and direct coworkers to alter a shopping behaviour, it’s unlikely to result in any change.
On the other hand, if I were to take that same group and be able to pressure my political representatives to do something about it (as we frequently see in California), then something may change. Similarly, me quitting my job out of disgust with a non-recycling policy won’t get any attention, but if I can get my union to take it up, then the company will listen.
TL;DR: a person can’t make change, a group of people can.