I need you to help me out, Veeky Forums.
Long story short, one the bad guys in the campaign is a crafty, planning, trickster-type guy.
In order to confront him, the players hunted down his daughter and brought her into his fort as a hostage.
In the fort, they fell for multiple traps and essentially ended up in a kill room-sturdy walls, solid doors, and a balcony from which the bad guy could brag, and demand they give him back his daughter or else they would die from the many archers on catwalks in the room.
They responded by slitting his daughter's throat, thinking that he would get pissed, come down and fight them, man to man, despite me outright saying both in and out-of-character, "this is a very bad idea, you probably won't survive."
Didn't stop them from slitting her throat and describing just how exactly they desecrated the body.
I ended the session there because it was getting late, but seriously?
Why are players so retarded?