Mess with me that's fine, mess with my family or my friends and I will see you in Hell. I could kill someone if the threat was great. I will always protect my family and my friends before I protect myself. I think I have it in me to kill someone who would or had kill/ed someone I cared about and be able to come to terms with it later. Animals are a different story however. In the instant of the black widow spider earlier, sadly I'd kill it regardless for preventative purposes. If it had already bitten the baby, it would very easily bit someone else. If it hadn't bitten the baby, it would. It's its nature and that should be respected. People have the ability to chose, no matter what. If they commit themselves to kill someone I love, i will commit myself to stop them or stop them from doing it again.