If I totally dislike someone, and the feelings are mutual, then I can be a very bad enemy.
I tell you, if someone were to try and mess up my life, I'd insult that person so much that it's ALMOST murder.

...and yes, that enemy could be a woman too.
If I feel someone's trying to make my life hell, then there are no limits to how evil I can be.

I'm usually a very calm person, though, and I don't like being evil at all.