Quote Originally Posted by Buffalobiian View Post
The United Nations Declaration of Human Rights has a few things most Western countries agree that each individual human is entitled to simply for existing and being a human being. It is largely put in place to prevent oppression of individuals and groups - even minorities.

Amongst those things are Freedom of Thought and Freedom of Opinion. To prosecute someone for having thoughts about child sex violates these rights.

Article #9 states "No one shall be subjected to arbitrary arrest, detention or exile."

That said, the rights of one individual will at times conflict with those of another. [Example: Freedom of Speech (threats) vs Freedom from Fear (to not feel threatenned).]

So what justification does the law have to prosecute, punish or even execute individuals? What makes a reason arbitrary and what makes it justifiable?

Do not dismiss the crimes: murder, rape and theft as "obvious" without thinking. They are crimes because such acts cause significant, proven harm to victims.
If you had read through the walls of text, you would've read the above.