Fucked up things

What is the most fucked up, horrendous or in any other way horrible thing you have done, where you sat afterwards thinking “man, what the fuck?”

My recent play through, Arthur started out with low honour, and a moral compass of a crime boss. I once shot a guy, a farmer, bound him up and dragged him around till I found is dog, then just beat up the dog, and left the guy there. As I went back to camp, Arhtur had that conversation with Mary Beth where he says something along the lines of “I just kill animals for no apparent reason. I just stared at my screen and thought to myself “what the fuck am I even doing.” Then of course Valentine needed yet another genocide to rid me of those thoughts.