What Mathew meant to say is "please send us some information so we can charge you with felony cheese pizza crimes." I'd also avoid sending information to NCMEC. I wouldn't send any information to any law enforcement. Law enforcement can't generally be trusted, and between plea bargains, charge stacking, and parallel construction, they'll easily slap you with a long felony record without a day in prison. Being "helpful" won't save you from an opportunistic officer using you as a career stairstep. Also, consider that while reporting on these things, you could also be teaching people how to access these things.