Early efforts to suppress the American child-porn trade a small network of adult bookstores and mail-order services were so successful that within a decade the market was all but nonexistent.
NEWYORKER: The Science of Sex Abuse
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Looking at child porn online is a sure-fire way to get yourself into serious legal trouble even if you were only looking at it for the sake of academic research.
FORBES: Child Porn Will Get You Into Legal Hot Water (Unless You Work For The Feds?)