According to some interesting research, working in a slaughterhouse may make you more violent. Amy Fitzgerald of the American Sociological Association found that US counties that have slaughterhouses consistently have higher rates of violent crime than demographically similar counties that don't.
Relatedly, Jennifer Dillard of Georgetown Law found that workers in industrial slaughterhouses are at risk to psychological damage, including post-traumatic stress disorder.
Apparently killing and butchering animals all day can fuck with your head and maybe desensitize you to violence. I could have guessed that, but now we have some empirical data supporting it. So what can we do about it?
I could make an argument against industrial farming of livestock, but that is a post for another day.