"Pedos can’t trade their images anymore (whether legal or not)."
The only thing that this move ended up doing was ensuring the use of private subreddits for this act. People aren't going to change simply because someone told them that what they already knew was wrong is now more wrong. The content will still be traded on reddit (even though I highly doubt that cheese pizza pm's actually happened very often), just not with a public pool to gather from.
From Wikipedia: "There are over 67,000 subreddits to peruse, with the default set being (as of October 18, 2011[4])." I could not find a specific number for the admin staff, but given the fact that wiki lists 11 staff members for reddit that number can not be particularly high; in fact the reddit admins steam group has 6 members. I sincerely doubt that anyone is capable of filtering 10,000 subreddits every day in search of offensive material.
Finally, even if somehow reddit manages to completely and utterly block all things they deem to be CP related, these people will just move to another, probably harder to track venue. All in all, this entire move is rather pointless action in response to people that want the feelgood sensation of "Protecting the Children."
I think that some people didn't want this stuff to end up on CNN, and having the media end up branding them guilty by association (i.e. "Reddit" == "Cesspool of pedos").
The only thing that this move ended up doing was ensuring the use of private subreddits for this act. People aren't going to change simply because someone told them that what they already knew was wrong is now more wrong. The content will still be traded on reddit (even though I highly doubt that cheese pizza pm's actually happened very often), just not with a public pool to gather from.
Plus, all of this shit is still up on imgur.