No NT is actually evil by virtue of being an NT. Why did you score so high? You don't actually want to be cruel to people and take over the world. I could understand not really caring about doing good in the world, but there weren't too many neutral options.
First, if the test is geared to NTs, it is not because NTs are inherently evil, simply that we tend to appreciate the humor in it.
Second, I think I scored this high because of how I interpreted the answers to make sense of questions, especially where my real answer wasn't offered. I'm not sure what point value was assigned to which answers, but I have listed some of the answers I chose and why below. Perhaps this will help answer your question.
Q - Death is ...
A - Yes... So what's the question? (other answers were silly)
Q - How many children do you have?
A - Born or surviving? (I've known people who have had miscarriage/stillbirth/child death.)
Q - What do you think of weapons?
A - Who needs weapons? I *am* weapons. (From karate - "here are my weapons - my empty hands". Also, non-physical weapons.)
Q - A close friend comes to you in tears because...?
A - He/She does not understand why you are being so mean and cruel to him/her (sometimes I am misunderstood to this degree)
Q - Are you happy?
A - That would be telling... (reluctant to divulge emotional information)
Q - How do you feel about nuclear disarmament?
A - It makes the world safe for more conventional weapons (we'll never get rid of war; conventional weapons are the lesser of two evils here)
Q - Which is the most favorable activity?
A - Global domination and enslavement (OK, this was a stretch, especially since I do enjoy gardening, but I enjoy many things much more. If I really thought I could impose my way of doing things on the world, or at least my corner of it, it would be far more gratifying.)
Q - Do you consider yourself evil?
A - It's all in how you look at it. (good/evil is a subjective distinction)