You appear not to have a brain in your head.
They were not simply arresting people who posessed child porn.
The story says they were arresting people who appeared in pictures sexually using kids. Using modern forensics, they located these people by locations shown in photagraphs
Jimred, you are defending this awfully hard.
I want you to know that if you ever take a photograph of yourself boinking a child I want the law to end your life outside of prison walls. And I do not care if someone else planted a copy of said picture in some other computer or not.
It is not my intent to defend it, only to point out the potential for misuse to tar the reputations of those with whom the accuser disagrees politically. A halfway good hacker could easily put your picture or mine in an abuse photo, or edit us into a youtube video. That could include someone using "modern forensics", agents of our own government. Then even if you prove your innocence six ways to Sunday, the stigma of the accusation remains.
It is a sad thing that because of the win-at-any-cost standards of the enemy that we even have to consider the possibility that some of the accused may be innocent. Personally I would have the guilty executed by baseball bat and blowtorch, but that's just me...