Track Down and Erase Your Records
If you want to be entirely undetectable, you will have to cancel every online account you have and delete all its evidence. But it won't be that simple. Like oily fingerprints, your internet presence is hard to wash away. A site called Web 2.0 Suicide Machine may help. It aids in wiping the web clean of digital identities, but even that is not entirely foolproof. After all, you can't control what your "friends" have copied from your profiles and/or posted on their own.