Stopping the spread of CP through any means

How would I go about writing a virus that takes down CP websites? I know C and perl, but I've never written a virus or done any Greyhat things before. I'm not asking for a tutorial, but just a few pointers in the right direction to start learning.

Thanks in advanced for the advice.

Things you will need:
- A botnet, to attack the sites without fear of retaliation.
- A vulnerability scanner capable of operating within your botnet, with a design that allows for distributed, parallel operations, unreliable nodes, and that is scalable.
- A machine vision component that is capable of scanning images and videos for underage forms with a fairly high accuracy rating.
- Some sort of mutating infection vector that defies detection and removal. Your nodes will need to be operating for a very long time, so you can't risk one going down in the middle of an operation.
- Vulnerabilities in encryption cyphers such as AES-256 or enough computing power to crack them.