The one thing that I didn't see addressed here was:
Spiderklown, is it someone(s) in particular that is making your life miserable that you'd like to get rid of, or do you mean, in general you'd just like to take people's life??

Being angry, even long term type angry and holding a grudge and contemplating how you'd like to do someone in, someone who has maybe made your life a living h3ll, that can be understandable.
But to just think in general,"Ya know what I'd like to do? Just go out and kill people"...... that needs some serious counseling!