I don't understand why this is so other than the fact that you said so. But as it is off-topic we'll just leave that unexplored.
Why is murder wrong other than the fact I said so?
I get to pick which rules to obey? So if I don't agree with the rules not to empty my toilet into your your drinking water supply I can do it without any consequences? Interesting.
That's a form of aggression against my property.
I'll just have to find somewhere to live where everyone else around me pays to have guards patrolling and I'll be fine.
Unless, of course, the people running the private security firms are going to want to discourage that by working together to compile lists of unprotected properties. When your name/address doesn't show up on the list, you'll be on the criminals' lists instead.
Not at all. I have something against "they kill someone from our gang, we kill some from theirs" mentality.
If you take my stereo, you ideally owe me my stereo plus restitution. If you can't give me my stereo back, you owe me a stereo of equal value. If you take my life, you ideally owe me my life plus restitution. Since you can't give me my life back, you owe me a life of equal value. Since all human lives are of equal value and since you can only give me your life, you owe me your life. Since I'm dead, you owe my family your life. How can someone that commits murder protest any of this? If you don't like it, don't murder people. I don't have much sympathy for murderers.
So would someone who doesn't want medical attention because their imaginary friend told them not to be qualified as "fully rational"?
Yes, people are allowed to be wrong.
How about someone who is watching their kid starve, would they be concidered to be fully rational?
That's not enough information. Are they doing it because they are mean bastards or because they are crazy?
How about under the influence of drugs?
That depends on how much under the influence. Did they smoke a joint or did they smoke an ounce of PCP?
Temporary mental illness?
Obviously not, until the temporary mental illness passes.
Is this all you've got, a shotgun blast full of questions in the hopes that I can't answer them? If I can't answer every question to the smallest detail then "Aha! Anarchism can't work!"? That would be an argument from ignorance. You can't just ask questions and hope to stump someone. You have to make an actual argument for why it can't work.