Somewhat offtopic, but the subject caused me to make a disappointing realization:

The most sure way for someone to obtain child porn images that won't trigger a hit in these known child-abuse-image databases would be for someone to take new photos.

Is there a reason we can be confident that these databases aren't creating a market for novel child abuse at a greater rate than they're taking abusers out of the community? Esp since presumably abusers are only a (small?) subset of people who view these images?