1. yes, you can defend yourself or hire others to defend you but if you need to perpetrate some retributory or punitive violence then ideally the state will do it for you because if you allow individuals free reign in doing so then you have vigilantism which is even more arbitrary and violent than any centralized authority, mob justice and lynching are not preferable to legitimate civil and criminal laws.
   If we had no police and instead had to hire private protection agencies would you hire one with a reputation for weakness or one that would strike fear into the hearts of your enemies?
   If we had no central government to enforce antitrust laws how would you prevent all the alternative protection agencies from forming a monopoly?
   Why would they bother to compete with one another instead of consolidating?

1. Of course, and I wouldn't stop there, I would take slaves, lots of slaves. But since those things are illegal and I don't want to have to go to jail or court I don't do any of them. Why wouldn't you?

You seem to be relying on everyone having what Nietzsche would call a "slave mentality".

The courts have also affirmed the legality of barring those deemed to intelligent from law enforcement.