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.
Younger kids and adults with those kids are fine, I’m happy to let them pass.
I’ve never seen an adult riding on the sidewalk alone where I live.
Teens riding those electric scooters while staring at their phones, OTH… I mean, of course I get out the way, because I don’t want to get hit, but I have the intrusive thought of pushing them over when they pass.