Story: I was on a bus once, another passenger was a guy with a big McD Coke. We got off at the same station. Here, each station has a trash can.
So this guy walks right by the trash can and drops his fucking coke right next to it. He could have extended his arm like 10 cm more, and the coke would have gone into the trash can. But he chose to drop it on the floor.
This was years ago, and I think this day broke my faith in humanity a little.