There's a single-page comic where some stallion was standing on a wooden platform on top of water with his hooves chained. The CMC asked what his cutie mark meant, and he said it's odd to him a new line forms everytime he killed someone, and he had quite a few lines, like 6-9 IIRC. There was a sign reading 'convicted criminal' or something like that.



So, yeah, definitely self-defeating.